Friendship Boundaries & Burnouts

A true friend supports your growth, respects your boundaries, shows up (emotionally and physically), celebrates your wins without competition, and accepts you even when you're not the best. I struggle with friendships, whether it be communicating or trying to get out of something because I actually just don't want to go but don't want to upset anyone. You know... the usual stuff. But we all have these challenges in our relationships, whether meeting new people or keeping up contact with current relationships. Any advice??