Yes I feel the same way... sometimes I feel it's hard to just even have a conversation with someone without feeling like they are thinking the worst of me. Then if we don't stay in contact I end up feeling like i was right.
Idk I guess it's natural as you get older as previously stated, but it doesn't help to have a mental illness get in the way further.

I haven't had any long term friendships since highschool and I let everyone go that I used to know. I'm a little too experienced here.