I'm in love with my best friend

As the title suggests I can't stop thinking about my best friend. We have been friends for a little over a year now and from the first day we met we instantly connected. I speak to him everyday for hours most of the time about nothing, but when I need him he's there and likewise me for him. He seems to be all I think about and my other friends have noticed this aswell. I don't know what to do, I don't think it would harm the friendship if I told him but I'm so terrified he will reject me. There are times when I think he might like me and others when I really don't know. We don't get to see eachother often but when we do the whole time is spent laughing and having fun together. We have kissed quite a few times but always when we've been drinking and it's never been mentioned again afterwards. This makes me think that it may just be a sort of drunken attraction but then he realises in the cold light of day that he just wants to be friends. It's driving me mad not knowing but I just can't imagine ever telling him or how the conversation would come about. Please help! Sorry about the essay lol