Do you like any RPGs or things like MTG, Yu-Gi-Oh!, Force of Will etc... If so you can go to sites like locator.wizards.com or pathfinder-roleplaying-game.meetup.com to find groups/events near you. My husband is a TO for Friday night Magic at a local store. I see people come in all the time looking very nervous and on edge and we do our best to make them feel at ease. The people that come in to play Pathfinder are very nice and never turn anyone away.

If things like that aren't your cup of tea maybe you could try a bowling league or volunteer at a shelter or nursing home.