Yes you are right that many ppl do that. PPl do that to their Ts also... imo... seeing if friends or Ts "can handle" what you know... to see if they will stay if they had a glimpse of what you feel. I think it's part of the trust issue.
Sometimes though, ppl who have been hurt do strike out hurting others in the same way.
Withdrawal of feelings, preventing interactions with others, is a form of coping but also of testing, imo.
When we realize our actions, and some of the reasons behind them, we are on the way of correcting our actions and feelings, and on the way to healing!!!!
You are doing so well, fuzzy!