@mona This guy's painfully retarded, doesn't realize her "ex bestfriend" is trying to break them up to spite his GF. This is a hard lesson for you but you get it quick should you have a gf with enemy girls - I once had this girl in class coming on SUPER strong when I'd been dating this chick for a month or two. She found out what was up and warned me that she had crashed into that girl's car back in school and she still held a grudge over it.
Everything makes more sense when you know that girls aren't friends the way guys are