I'm 20, with my 21st coming around next month and I hardly go out at night (weekend or weekday). I'm invited to quite a lot of events: parties, dinners etc, but I hardly ever attend them, because of my SA issues. It does bother me from time to time, looking at pics on facebook and seeing "the events of last night", club pics, party pics, festival pics etc, but other times I don't mind being a homely person. Most nights, I'm spending my time with my boyfriend anyway, wouldn't ask for anything else 🙂
I spend the vast majority of my Saturdays alone. Its not that I don't like being by myself at home, I just don't like some people's perceptions of people who just stay home all day. As a result, I feel kinda crappy.