I feel uncomfortable existimg in my own home

So basically I live with my bf of 4.5 years and his family. We pay our part of the bills and they pay theirs but over time it's like things have gotten hostile. His mom used to be sooo nice to me and so did everyone else and now it's like weird and she barely speaks to me, just now I told her good afternoon and she completely ignored me. I have done literally nothing at all for her to be acting some type of way with me. She has referred to things as "ours" in a way that clearly does not include me. I barely get any space dedicated for mine and my bfs things meanwhile everyone else has plenty of space for themselves. I'm already anxious as it is and now being around any member of his family makes me extremely uncomfortable. I barely eat because I go to the kitchen and since they're in there I can't bring myself to make anything so I just quickly grab something and quickly get out of there. It's to the point where I have a backup plan every time I go to the kitchen. It's honestly starting to turn into anger. I feel so upset that I can't live freely in my own home without having to worry about if they'll be around. I don't even bring my friends over because I feel like it would be way too awkward. I stopped buying most foods because I know I'll never have a chance to cook them without feeling like an elephant is standing on my shoulders. I don't know what to even do. I've expressed to my bf that I would like for us to have our own place but that just doesn't seem like a viable option at the moment. I feel so defeated, like a child who nobody wants around. I genuinely don't know how much longer I can take this.