Why do I hate people who want to be near me?

I’ve developed a problem over the past few years, and now seem to completely hate being around people that are genuinely nice or want to be with me a lot. I didn’t have this issue before, it’s just popped up, but I’ve pushed all but one of my friends away, refuse to make new ones even though I know it’d be good for me, I hate my family and spend as much time away from the house as possible despite them being so nice and helpful, and I hate being around my dogs. I had this same problem with my older dog that passed away, I started hating being with her even though she was clearly in pain and needed help. Now I told myself that wasn’t going to happen again with the new dogs, but it’s only been 8 months and I’ve already started distancing myself and locking my bedroom door at night so they can’t get to me. I feel horrible and want to spend time with them so it doesn’t go like it did the last time, but I just can’t bring myself to look at them. The only person I don’t hate being around is my best friend, but that’s probably because we don’t see each other nearly as much as the rest of my friends, and he isn’t as pushy about going out and doing things. I’m so confused though, I looked it up and it said I was just mad at something they’ve done, but i can’t think of anything that would cause this big of a reaction from me. I’ve tried just letting them be around me and ignoring it, but the past few days I’ve spent the night crying myself to sleep. It legitimately hurts me to be around them, i feel sick right now thinking about it, and can’t seem to keep down any food i eat. I just want to be with them, i don’t know why this is happening. If anyone knows, please say so.