Hi
During my episode, my thoughts and behaviors exhibited most of the avoident personality traits. When I shared this with my therapists, they told me that they don't diagnose adolescents with personality disorders as their personalities are still forming. So whether I had AvPD or not, I don't know. But I can assure you that the feelings I had were very real and so overwhelming that I went to extreme measures to avoid things.
Although I am better now, I still have certain issues to deal with. So in answer to your question, people can overcome this. We all can change if we want to. I think no one can 'recover' from disorders like this, but recovery is possible.