This is a trait I have and I wonder if this trait are shared with others.
I dislike talking about my friends with other pople.
It's not that I am ashamed of my friends or anything, but it just feels strange to talk about them. Especially to strangers. It's like I'm illoyal, that I do something wrong by trying to define my relationship with them without their consent. It works a little better if they are present and can adjust me if I say something wrong, but it still feels uncomfortable.
But since alot of bonding requires talking about other people, I feel a little.. handicapped in forming new relationships so to say.
It was when I went to a therapist I got aware of this tendency with me. He asked whetever I actually had any friends, since I never talked about people. I never even noticed I avoided talking about them.