Just doing an informal survey:
Do you consider yourself shy or outgoing?
Are you socially shy (outside of work) but outgoing at work? Vice versa?
Do you avoid social situations because you are incapable of interacting socially with strangers or at least believe you are?
Do you challenge yourself socially (the equivalent of cliff diving by jumping blind) by doing social events that make you really uncomfortable as if doing so is swallowing some kind of bitter medicine and the possible socializing is the possible cure for your introversion?
Or do you only do your socializing via web forums like Facebook or able2know, etc...?
If you are an extrovert and need a cheatsheet to how introverts see the world:
23 Honest Confessions From Introverts