There seem to be some good books on avoidant personality disorder. I'm going to check one out that I saw on Amazon.

The blurb may convince some of ya'll to give it a go:

The avoidance reduction techniques presented in this book recognize that avoidants not only fear criticism and humiliation, but also fear being flooded by their feelings and being depleted if they express them. Acceptance is feared as much as rejection, because avoidants fear compromising their identity and losing personal freedom. Kantor describes the different therapeutic emphasis required for the four types of avoidants, including those who are withdrawn due to shyness and social phobia, such as people who intensely fear public speaking; those who relate easily, widely, and well, but cannot sustain relationships due to fear of closeness; those whose restlessness causes them to leave steady relationships, often without warning; and those who grow dependent on―and merge with―a single lover or family member and avoid relating to anyone else.