Okay so...what's up with this guy? Ah! Too much drama.?

He sees you as a challenge, i dont think he likes you quote on quote, but i think he had an intrest to see if he can "get you". The reason i say this is becuase he clearly dated Sara and it kinda sounded like it was too make you jealous. Not many males tell other females about their relationship like that. Plus he knows she "slutty" Im sure and was ok with it cause he still dated her. I would just tell him. Keep in mind when you do this he may act diffrently towards you. And if he does, then he is not ur real friend. It sounds like this guy is kind of a pain. So tell him how u feel and if he doesent speak to you then hes not ur real friend.