Knock him/her out سے طرف کی hitting them on the head with something heavy, tie them down in your basement, and torture them سے طرف کی cutting them and stabbing them until they say they'll marry آپ and stay with آپ forever. If not, kill them. They don't deserve to live if they wont love you.
Uhm, befriend him I guess. He must know how kind آپ really are in order for him to like you. "Like" comes first before "love", even in the dictionary. :)