It's Only A Paper Rose

I doubt it's a lack of trust. You're framing it that way, but it may be just that you're not hearing their needs. Maybe they need you to listen and not try to fix it. Maybe they need you to love them and tell them it's going to be okay without needing to know every detail, because they're just not ready to tell the story. Maybe they need you to just be there and not try to psychoanalyze them because they want to figure themselves out for themselves, not having someone else tell them who they are. Does that make any sense? None of those are due to a lack of trust in you. You're so careful in choosing your friends, I can't imagine you'd have anyone in your circle who secretly mistrusts you.