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