my mum's "weird" boyfriend.

okay, i don't know if im overreacting, so im gonna need some thoughts on this.
my mum's boyfriend (28, a key worker) has been living with us for a little over a year now, and he's not a nasty person or anything, but these past few months we've butted heads often, and these last couple of weeks he's been pushing my boundaries and ****ing me off quite a bit. "little" things, but to the point where my mum has had to tell him to stop.
(i think?) he sometimes comes into my room with my mum to help her fold my washing on my bed when she's doing jobs around the house, but this morning she made him confess to me that he'd stolen the bag of chocolate out of my room that I'd put in a bag for my friend's birthday. didn't ask, didn't tell me until pushed to do so, and ate the whole thing in the time space between late last night and early this morning, when I was at my dad's house.
i was told he'd buy me a new bag of chocolate for my friend, but I was furious and upset; that wasn't the point. he'd come into my room, most likely alone, gone all the way to the back, rummaged through my bag and took the chocolate. my curtains were still closed and i had no fresh washing on my bed (signs my mum hadn't been in the room, and signs that he had NO reason to be in there). I have no idea what he was doing in my room alone, and as i said previously, he's not a nasty person, but i barely know him. not only do i feel this is an invasion to my privacy, there is stuff in my room (a female teenager) that I do NOT want him to see, and this has made me incredibly uncomfortable!!
am I valid in feeling my privacy has been violated, or am i overreacting?

okay, i don't know if im overreacting, so im gonna need some thoughts on this.
my mum's boyfriend (28, a key worker) has been living with us for a little over a year now, and he's not a nasty person or anything, but these past few months we've butted heads often, and these last couple of weeks he's been pushing my boundaries and ****ing me off quite a bit. "little" things, but to the point where my mum has had to tell him to stop.
(i think?) he sometimes comes into my room with my mum to help her fold my washing on my bed when she's doing jobs around the house, but this morning she made him confess to me that he'd stolen the bag of chocolate out of my room that I'd put in a bag for my friend's birthday. didn't ask, didn't tell me until pushed to do so, and ate the whole thing in the time space between late last night and early this morning, when I was at my dad's house.
i was told he'd buy me a new bag of chocolate for my friend, but I was furious and upset; that wasn't the point. he'd come into my room, most likely alone, gone all the way to the back, rummaged through my bag and took the chocolate. my curtains were still closed and i had no fresh washing on my bed (signs my mum hadn't been in the room, and signs that he had NO reason to be in there). I have no idea what he was doing in my room alone, and as i said previously, he's not a nasty person, but i barely know him. not only do i feel this is an invasion to my privacy, there is stuff in my room (a female teenager) that I do NOT want him to see, and this has made me incredibly uncomfortable!!
am I valid in feeling my privacy has been violated, or am i overreacting?

okay, i don't know if im overreacting, so im gonna need some thoughts on this.
my mum's boyfriend (28, a key worker) has been living with us for a little over a year now, and he's not a nasty person or anything, but these past few months we've butted heads often, and these last couple of weeks he's been pushing my boundaries and ****ing me off quite a bit. "little" things, but to the point where my mum has had to tell him to stop.
(i think?) he sometimes comes into my room with my mum to help her fold my washing on my bed when she's doing jobs around the house, but this morning she made him confess to me that he'd stolen the bag of chocolate out of my room that I'd put in a bag for my friend's birthday. didn't ask, didn't tell me until pushed to do so, and ate the whole thing in the time space between late last night and early this morning, when I was at my dad's house.
i was told he'd buy me a new bag of chocolate for my friend, but I was furious and upset; that wasn't the point. he'd come into my room, most likely alone, gone all the way to the back, rummaged through my bag and took the chocolate. my curtains were still closed and i had no fresh washing on my bed (signs my mum hadn't been in the room, and signs that he had NO reason to be in there). I have no idea what he was doing in my room alone, and as i said previously, he's not a nasty person, but i barely know him. not only do i feel this is an invasion to my privacy, there is stuff in my room (a female teenager) that I do NOT want him to see, and this has made me incredibly uncomfortable!!
am I valid in feeling my privacy has been violated, or am i overreacting?

In my opinion, If they wanna enter your room and move something from your room, They should got your agreement or let you know at least. This kind of behavior is not respect you privacy. You should angry and tell you mother and her boyfriend" I don't like it." I also angry and feeling unwell when I go back china for hoilday that my carpet is cut by my mother without my agreement. This kind of thing also happen many times in my home and I told them my feeling many times. But nobody listen.

UPDATE
after much hesitation and reassurance from my nan and my friend's mum, i decided to speak to my own mum about the matter. however, as much as i tried to keep my composure, we ended up having a long, heated argument about it, in which my feelings were invalidated and i was called dramatic and that i was overreacting, which i feel was unfair on my own behalf.
my mum defended her boyfriend over her own daughter, and brushed the situation off, and i feel she was not willing to try and understand the point I was making. she insisted that i do, in fact, "know him well" and that I was over-exaggerating in my dislike for the situation, claiming that "it's my house, and he can go wherever".
i don't know what to do, as she refuses to let me permanently move in with my dad or nan, and I don't feel comfortable not having the support of my mother. it really is bothering me, and my gut is telling me that it's not right, nor is it normal, but her words make me feel unreasonable.

UPDATE
after much hesitation and reassurance from my nan and my friend's mum, i decided to speak to my own mum about the matter. however, as much as i tried to keep my composure, we ended up having a long, heated argument about it, in which my feelings were invalidated and i was called dramatic and that i was overreacting, which i feel was unfair on my own behalf.
my mum defended her boyfriend over her own daughter, and brushed the situation off, and i feel she was not willing to try and understand the point I was making. she insisted that i do, in fact, "know him well" and that I was over-exaggerating in my dislike for the situation, claiming that "it's my house, and he can go wherever".
i don't know what to do, as she refuses to let me permanently move in with my dad or nan, and I don't feel comfortable not having the support of my mother. it really is bothering me, and my gut is telling me that it's not right, nor is it normal, but her words make me feel unreasonable.

To be honest, you mother's words is true in some way. She own this house and she have right to charge this house. she have right to let her boyfriend enter any room as he want. And you can't do anything change without her agreement. I think you should leave this house when you are a adult or argue with you mother.

UPDATE
after much hesitation and reassurance from my nan and my friend's mum, i decided to speak to my own mum about the matter. however, as much as i tried to keep my composure, we ended up having a long, heated argument about it, in which my feelings were invalidated and i was called dramatic and that i was overreacting, which i feel was unfair on my own behalf.
my mum defended her boyfriend over her own daughter, and brushed the situation off, and i feel she was not willing to try and understand the point I was making. she insisted that i do, in fact, "know him well" and that I was over-exaggerating in my dislike for the situation, claiming that "it's my house, and he can go wherever".
i don't know what to do, as she refuses to let me permanently move in with my dad or nan, and I don't feel comfortable not having the support of my mother. it really is bothering me, and my gut is telling me that it's not right, nor is it normal, but her words make me feel unreasonable.

UPDATE 2 (final!!)
sorry for late update😞
i came home the next day and found that my mum's boyfriend had..bought me flowers, chocolate, and was going to buy me a takeaway for tea? he also apologised and said he wouldn't "do it again". even my mum was singing my praises when i came home, which really confused me, considering the last time I'd seen her she'd been yelling at me for overreacting and not taking my feelings into account. because it had all been so easily brushed off, i began to doubt myself, and felt guilty for what i was starting to believe was a "tantrum" myself. however, when I told this to my friend's mum, she reassured me that i had no right to feel bad, as it was me they were being inconsiderate towards, which set me back on track!
i later spoke to my nan again about this new revelation, and she told me she'd had a firm lecture to both my mum and her boyfriend, in which she had managed to win the odds in my favour (don't know what I'd do without her!).
i still am opposed to my mum's boyfriend, as this was only the biggest incident (there are others, but this was by far the worst i think!) and we still regularly butt heads, but thank you all for your advice and reassurance on the matter!! it's all very appreciated💓