Avoidant personality disorder means you avoid talking about yourself. Not necessarilly avoid people but you will hide your deep feelings inside you. This is very hard for a person to open up even to therapist as he is just a person in front of you, just like anybody else that you will hide your feelings from. You need to trust this person in front of you. Trust is a big issue for people with APD.

If you have APD you will need to trust first!

I wish you good luck with this. And please keep coming here, it helps.

hugs!
nightdream