get him over
Try getting him drunk first, and throw yourself at him. If he still shows no interest, move on and understand it was not meant to be. If you value him as a friend, and want to remain friends, I suggest you don't push the issue, and try to let yourself down gently. You can't force someone to love you, just as someone your not interested in can force you to love them! It may be time to admit to yourself that what you have now may be the best you can get out of your relationship with him.
Yup. Feeling in a relationship is muture but also have to reciprocated.