Stuck in a love triangle! HELP! I WILL ANSWER YOURS!?

PLEASE READ I NEED HELP!Ok so its more like a love square. So my closest guy friends are B, Z, and O. And apparently they all like me(according to my friends and by what I c) so I used to like O but not anymore now were just friends. But everyone at swim think that we like eachother and r going out. What do I do and I can't be mean at all because he is the nicest guy in the WORLD. So Z I am positive likes me but were like rly good friends. And Z and B are rly good friends and neither of them know O. But I don't know what to do because its obvious that he likes me. So people at r school came up with a couple name for us and tease us bout it a lot. Finally B I really like him. But everyone makes fun of is the most with r couple name( text bombs, FB, walk down the hall and I hear people yelling r couple name) so I sometimes think he likes me other other times not. So he HATES all the crap we get I've decided to let it go but he HATES it. So whenever were around talking to other people he acts normal but if other people are around nut like not talking to us he is really sweet. I don't know what to so cuz I think he might like me but won't do anything bout it cuz he will be made fun of. How can I show him that I rly like him and what can I do about the others? BTW I'm in eight grade

THANKS IN ADVANCE! :D