Hmm. I had this problem as well when I was your age and I found that "networking" (I don't know if that's actually the right term or not, but it's the only term I know) really helped out. I found a good friend who had some similar interests as me and after hanging out for a bit he introduced me to more of his friends who all had the same interests. It went on from there. The amazing thing is though, not only did my friendships branch out, but my interests did as well. Because of those guys, I got introduced to cars, boxing, and MMA. Soon enough, I met more people that way. If you can find someone of like interests, it doesn't take much to expand from there. If I could give some advice though? Try to keep your circle of good friends small, maybe five or six max. Otherwise you'll soon find you have as much stress maintaining your new friendships as you did being alone.