You've described me pretty accurately here. I've always wondered if these habits/coping mechanisms/self-discipline/self-pity habits are components of ADD or if they are the results of a rough childhood. I've always told myself that I'll grow out of it, but it's questionable at the age of 27.

Books I've been reading tell me that social skills can develop at any age, however, and can grow only through practice. My booklist is on my tablet at home, but I'll be happy to post them when I get home if your interested.

You're not alone on this, so don't give up!