I was the same way for a long time. I would just sit in my room and listen to music or play some video games. Until a few months ago. Something changed. I don't know what. But I had the sudden urge to go do something new. Doing the same thing got boring. So I went out on a limb and talked to some new people, made some new friends, and did new things. I've started to jam with others (I'm a drummer). I've just found that it's more fun to just socialize with people than it is to sit in my room by myself. Even if I'm just going to sit around with a few people and talk. It's somehow more fun to me now than any video game. I don't judge anyone for being a loner. Everyone has their own thing. Though I do try and get some of my other, shall we say "hermit", friends to go out and do stuff with with my friends and I. I always offer. Just to see if I can show them there are other fun things.