Please get him to a dr.
I know how you feel. Never have I felt so disgusting in my life having to practically beg to get a long passionate kiss or having to dangle myself in front of him only to get rejected over and over. Even when it does happen i can't enjoy it because I know I'm going to get rejected again.
I hope you feel grateful that you are at least told how much you are deeply loved and are going to be married some day. That's something to be cherished. A man that can compensate-at least a little bit- for doing this to you is something very special.