What to do if your Boyfriend is greedy with food?

I'm a student, I live on a budget and I live with my Boyfriend.
My Boyfriend always wants to eat my food and I cannot eat in peace without him taking half my plateful.

I can't even have a full plate of food without him literally eyeing up my food and trying to take it from me to eat. He even does this when his dinner is cooking in the oven and I've just got time for a quick sandwich and then back to college/work. I can't have a single piece of birthday cake or gifted chocolates from my mum for myself. I can't eat a single meal without being nagged.
I have spoken to him and he knows its not fair, but he still does it.
I've added a few extra mouthfuls to my meals because I know he will ask, but he will scoff that and then nag me for more.
I do cook for him, but I can't afford too everyday.
I have started to skip meals and this is really bad for me as I used to have problems with eating disorders and I work so hard to keep myself healthly. I always share things with him and buy him food treats. Nothing works.
What can I say to him to make him truely understand how its making me feel?
I'm sorry if this is petty but it really bothers me and inadequate meals makes me quiet grumpy.
Thank you

I'm a student, I live on a budget and I live with my Boyfriend.
My Boyfriend always wants to eat my food and I cannot eat in peace without him taking half my plateful.

I can't even have a full plate of food without him literally eyeing up my food and trying to take it from me to eat. He even does this when his dinner is cooking in the oven and I've just got time for a quick sandwich and then back to college/work. I can't have a single piece of birthday cake or gifted chocolates from my mum for myself. I can't eat a single meal without being nagged.
I have spoken to him and he knows its not fair, but he still does it.
I've added a few extra mouthfuls to my meals because I know he will ask, but he will scoff that and then nag me for more.
I do cook for him, but I can't afford too everyday.
I have started to skip meals and this is really bad for me as I used to have problems with eating disorders and I work so hard to keep myself healthly. I always share things with him and buy him food treats. Nothing works.
What can I say to him to make him truely understand how its making me feel?
I'm sorry if this is petty but it really bothers me and inadequate meals makes me quiet grumpy.
Thank you

My fiancé is selfish with food in other ways. He will make something for himself to eat without asking me if I want any. He will put much more on his plate, save some for his dinner the next day in the pan and and put tiny portions on my plate. I’d we got put for a meal which involves sharing food, he will eat a lot more than I do very fast. I once went to the toilet and when I got back to the table there was nothing left for me to eat. If we order takeaway he complains if there isn’t enough for his dinner the next day and will start taking food off my plate. I am a size 8 and I’m hungry all the time. I haven’t made an issue of it because I’m very aware that he, along with his siblings were severely neglected as children And they often had nothing to eat for days and I honestly think it’s something to do with that. It must be a psychological issue for him so I just let it go.