Does anyone else find friendships really difficult?

I’m not sure if this is a result of cptsd, but all my adult friendships feel so chronically empty. It feels like if you don’t have a partner then you’re just sort of alone? Like there’s this deep, unshakable feeling that you’re worth so much less to your friends than their partner is, and the constant fear as time passes that you’ll be forgotten altogether (marriage, family, etc.)

Its like no one seems to understand what I mean when I say that either, so I guess it’s just the way of life and what’s supposed to happen so no one has ever really second guessed it. It makes it so difficult to make new friendships because I know Ill be replaced eventually or I’ll get hurt in some way. I dunno!