How to not make the summer boring?

It's been one week of summer, and I'm so bored I could die... I've rented almost all the good movies on on demand or whatever. I went to camp last year and had so much fun, but I can't go because I'm 15 and the age limit is 14. So I guess I have really high expectations for this summer, because last summer was soooo much fun. I also have three really close friends but there on vacation or hiking or somethin. Can I have some ideas of things I can do by myself (mostly) and alittle I can do with my friends when there not in like. Paris.