I'm in the same situation, but I'm fine with it.
My parents were very violent. My father is dead now from alcoholism and although I tried to have a relationship with my mother, I realized that although my sibling can do no wrong and she is always excited to get involved in his life, she fundamentally doesn't like me and complains about me. So I don't see her.
I have to move every few years for work. Although I thought I had great friends where I lived previously, they disappeared over the pandemic. Many have had children. Although other people who have moved away still seem to get invitations to Zoom calls and other events, a couple of us have been quietly dropped. It's pretty clear it's because I'm in a profession where I can't afford to participate in the expensive trips and restaurant meals the others enjoy. I made an effort to stay in touch but they don't seem interested and I have stopped trying. At any rate, I can't get past the fact that I only heard from a couple of them two or three times during the pandemic and only in texts a couple of lines long.
At work. people hated my boss and pushed him out and some don't include me because of my association with him. Also, I do calculations, which is new in the field, and unfortunately, some people have a problem with that. So although people are polite and I have made an effort to chat with those who have been at work for the past couple of years, I have never been included on Zoom social calls during the pandemic or been invited to events. And before the pandemic, I'd arrange events that other people came to, like dinners, trips to the pub, etc.
It probably sounds like I'm playing the victim and I don't mean to. I'm just one of those people who other people don't care about that much. I'm a size 18 and one thing I have noticed about the UK (I'm British but previously lived overseas since early childhood) is that women like me are not included. I feel like I look normal--no different to Princess Bea at her heaviest. No one has a problem with me. But also, no one wants me around, probably because that would affect their image. I'm not imagining this. An older woman who organized social events at one point told me to my face when I arrived that she arranged social events for the young, cool people (I'm 44).
I'm social, anyone who met me would say good things about me, I think. But I'm not important to people. Part of it, I think, is that people aren't doing that much themselves. They go home to husbands/wives and see old friends occasionally. So I don't think most people are living any differently than I am. I go to a great meetup but people are never interested in doing anything outside the group and other social meetups seem to always end in people telling me their problems.
I don't know what the answer is but I have taken a cold-eyed look at my situation and decided that I can either have work I enjoyand have to live in the UKor I can go elsewhere and have a great social life and feel normal and included but not have a good job.
I'm perfectly happy and I think that's because I do a lot of exercise. I suggest that.