It is not unusual for a girl to fancy a man much older than herself, but to fancy him so much that she will take the initiative to date him, and to tell the world about it and that he has turned her down, is really something. You are one of a kind.

If you really can do the belly dance, there is no need to appear traditional to him; just do the belly dance in front of him at a suitable place, and you should win him over in no time. Unless your belly or your belly dance sucks, or he is really really too old a man already.