Most Helpful Guy
Look, just appear like you care.
Most Helpful Girl
Don't unfollow him. Don't ignore him either, but don't initiate anything with him. Get someone else, hang out with other people and maybe replace him with someone whether it be another guy or a girl or a new best friend. Either that, or you can be the bigger person and just text him, or wait until you see him, and just tell him that he just has to tell you whether or not he's interested, and you're not bothered with a pretend relationship.