Gigi, you probably won't believe this (almost no one does), but I'm very shy. When I was a teen, if there were such a diagnosis, I would have been labeled "psychologically or pathologically shy". Now there is a term, "Social Anxiety Disorder". I was beyond shy. I worked and worked on this, needless to say, without medical help. Extremely introverted/shy folks don't ask for help. Having gone through 8 years of college, and then 45 years of dentistry, I knew I had to go beyond my comfort zone. I still have trouble though, particularly if there is any sort of a crowd. I'm fine one-on-one, and will talk someone's head off. Just ask the 100's of visitors I've had over the last 3 yr., those visiting my little nursery.....
I still tend to be a loner and it's difficult for me to make friends. Always has been this way, and (unfortunately) always will be.