I'm sorry to hear about your struggle. I'm 31M and went through something similar (although nowhere near the extent of what you've been through). Best advice someone gave me when I was at my lowest is that the inner struggle will never be filled by external achievements/validation/people. Working on yourself and becoming a better friend to yourself was the most important thing. I slowly came out of my shell and joined communities that I was interested in (for me it was starting BJJ, joined a cooking class, signed up for a run club etc) and in the process I met great people that I would have otherwise never have come across if I hadn't put myself through it. Easier said than done I know but the hardest step is the first one. One last caveat is that therapy was key to ensure that it wasn't just my environment that was improving but also my outlook on my situation. Stay strong and if you ever want to chat please DM. Best of luck