All I can really suggest is a personal approach. In old days only the male was allowed to make an "advance"; but that is not the same today! So talk to him. Invite him to your birthday party.
But, if he doesn't care for you, then I'm afraid he is not for you. Here is a very old Native American proverb:-
"If you love something, let it go. If it comes back it belongs to you. If it does not come back, it was never yours in the first place."
Never mind the spells, talk to him; but don't pester.