Hey Kelly, from my interpretation of the story, I feel like "the boy" suddenly changed his feelings once he saw you flirt with other boys around him. Although, you guys werent together at the time, he probably felt jealous because even though you guys arent together, he still feels like your still his. "The boy" seems kind of mood-controlling and mind-controlling towards you because it seems as if whatever he decides to do with your relationship, you go along with it..from breaking up to getting back 2gether, 2 sleeping together, and becoming "friends" again. I think you should step up for yourself and decide what you want, because obviously this boy doesnt have a clue what he wants with you and he is only making things more confusing for the both of you guys by jumping in and out of your life over and over again. I wish you the best of luck!