Fun things to do until my friends come back [see details]?

All my friends are on vacation now, and I’ll just be alone for a couple of weeks. I miss them, of course.
I like listening to music, playing guitar, reading books, and watching movies, but… two weeks?
What are some fun things I can do so that I won’t die of boredom until my friends come back?

ps. I hate sports, and places that are really crowded.