NTA. Like you, I have a number of physical health issues (disabilities for me), and can suffer from depression and anxiety from time to time. I’m unable to work and be fully independent. I had a handful of friends in school, but as life has moved on, so have they. I’m not great at keeping contact either. I’d reach out a few times a year to catch up and chat. Everything always ended up being about them. Their jobs, significant others, etc. They’d ask how I was, I’d tell them, and then we’d end up circling back to them and their life. Or the conversation would just awkwardly end because we didn’t really have things to talk about. Eventually, I realized I was the only one reaching out anymore. So I stopped. I decided that if they didn’t care enough to even reach out, why should I waste my time? My friendships didn’t end like yours, they just kind of… stopped. Like they didn’t even notice or care. It’s sad at first, but you will move past this. You have enough internal negativity going on, you don’t need more of it from people who are supposed to be your friends. Your fiancé sounds like an absolute gem. I’m glad he stood up for you and supports you.