The only person I really hide from is one of my exes because her mentality never progressed beyond middle school so she's constantly trying to pick fights with everyone around her. She can't find me thanks to my living conditions, but she has like a godtillion Facebook accounts so she just bothers me on there instead.
As for being social, I try to be. I find it to be pretty draining if I'm just hanging out with someone, though. The thrill dies off after a while and I just sit there wondering how much more fun I could be having at home.