Thanks, Curiosity77. I tend to make friends easily when I do theatre, I just get along with theatre people really well (like people with mental illness, they are usually able to appreciate weirdness) and the nature of theatre makes people performing together really close, but once the show is over I don't know how to keep up the friendship.

I'm unsure whether I'll be in university or college next year but there is a support group for students that meets at the university. I'm not sure if they run during the summer, but if they do, maybe I'll try to make some friends there.