Clues if i like my long time bestfriend or not?

Sure he does. Probably more than he now shows. At 15 he is in the process of becoming a man while your in the process of becoming a women. You once were kids and now both are starting to look at things like adults. It's a tough age but hang in there him. Continue to be the best friend you can to and with him. Who knows. you might be friends with your future husband. If not, cherish this friendship. they're hard to come by. r