Okay here's my problem: this boy and I used to mess around, kissing and "stuff" like that, so I started liking him. I had a friend ask him if he liked me too, he told her he did. So I asked him about it and he told me "he met someone." Well know I have two classes with him and I get very nervous being around him knowing everything we did. How do I just stay friends with him and forget about what we did?

Just be friends... hang out. Ask him to the movies, study together, anything. Just don't bring up the past .