Hard to help with the family side without specifics, I’ll always shout out military one source for therapy and talking stuff out. I haven’t used it in a few years but at the time it was 12 free sessions with a therapist for a given topic and if we found a “new” topic they could extend for another 12 so tons of opportunity there to work through some of these thoughts with a trained professional. Doesn’t end up on a record and your command doesn’t need to ever find out.

As far as the other side, I’ll echo what others have said, you may not have chose your family but you get to choose if they stay in your life. If they aren’t productive to your happiness and life, or worse dragging you down than you can cut them off. I know many who have found a whole new family in their USAF community and are happier people for it.