How can i know if my guy friend likes me?

It seems to me that you have been playing around with each other for a while now. It is very un clear if he likes you or not and I don't think my opinion if he likes you or not or nobody else's opinion will give you a conclusion on whether or not he likes you. I think the only person who can tell you that is him. I believe you should tell him how you feel because it seems to me that you are thinking about this 24/7, but not in an obsessive way or anything. The truth is everyone goes through this fase where they think 'they are in love' or whatever. Im not here to tell you that you are too young to be in love as you see stories all the time where people have been married since they were young and together since they were 12! But that isn't what you want to know. Personally I would tell him you like him because it seems to be putting some strain on you and also I think you need to find out for yourself and him. If he says he doesn't like you I don't think you'll loose his friendship because you seem too close. Many may be reading this now and thinking she's only 12 or whatever, she doesn't need love but the truth is everyone goes through this fase where they think they're in love and all that... Go for it tell him you like him! Whats the worst that can happen? One day you'll think about this guy and think, was I really that in love? The answer will be no. But you need this for your development. The truth is nobody knows "How you know that a guy likes you". Nobody knows, everyone's different! It annoys me when these magazines publish that they know how to know and so on. To conclude, follow your own instincts, they are the best. Nobody knows whats best for you except yourself. Take my advice. Hope everything will be okay soon and hope your relationship/friendship is as good as it seems in this paragraph you wrote.