Why is it that whenever I'm in the middle of a social situation, I feel anti-social, and yet when I finally have a chance to do anti-social things I feel social?

Currently reading The Picture of Dorian Gray (not Portrait). Dorian Gray's an okay guy turned into a jackass, Lord Henry's more of an ass for causing this to happen but kinda hilarious at the same time, and Basil Hallward's just the sad onlooker of things.