Is my best friend actually disrespectful using my house like a hotel.

my best friend of 12 years recently invited a guy to my house every day this week he has been here because he lives an hour from her and sadly im a pushover because she only asked once he had left and simply would hate me if i said no , i said yes on one condition that hes respectful and u dont disturb me doing college work, she said i was rude for sitting im my room doing my work and rudely said i should work in the room they were in not bothered to argue i did as to where i have gotten nothing done due to them constantly making noise and making me uncomfitable, to make it worse they said theyd never do anything in the house as they think its disrespectful however this morning i walk pass the door to hear what i dont want to even know about.all i said is i told u i could hear everything in the house , she hasnt said anthing back yet as it was via text me not wanting to go in the room, just to add this is my family home with my mum and mums bf in another bedroom.I don't like arguing with her because she's the type that blames everything on me she makes me feel so guilty for saying no and I just give in now , am I over reacting when I did tell her none of that in my home because this is my family home it makes me uncomfortable and don't like being forced to try and drown out the sound with headphones feel like she's using me like a hotel because she cant take people home to her house and she hasn't been round my house without him for a long while now she also decided to roll a joint in my house with him while I was asleep the other day we couldn't get rid of the smell of weed. shes a very self centred person but am I overreacting ???