You could join the adult class at a karate studio. Martial artists are really nice, and studios are very social, encouraging, and supportive places. You could also join a group that talk about your interests, like a book club, a discussion club, art club, car fanatic club, gun club, etc. Trust me, joining a group like this is worth the effort. It really helps you come out of your shell, just make sure it's a supportive group and not one that demeans and degrades those who are different.