I can't say for sure that this isn't a self-esteem issue. Do you have trouble making friends at school?
I suppose I do. I mean I don't have very many friends but I think part of the reason is because I'm happy with my two friends and I can't be bothered with anyone else
I ask because now you have a very good friend who is somebody you don't even know in person and when you couldn't talk to him for a while, you were extremely bothered. Almost like perhaps you like the anonymity aspect of the relationship. Honestly, you should talk to your school counselor about this or better yet, talk to your parents so that they can get you into see a child psychologist. This does not mean you are crazy or anything but that you are having a hard time dealing with relationships otherwise you wouldn't have written on the forum.
And yes, as a mother I will tell you that you should drop the conversation with this guy because there are a lot of crazies out there pretending to be teenagers but you already indicated you knew that this wasn't a good idea in retrospect.