How can i break up my friend and his gf?

yeah i know what i'm doing is mean but idc. his gf and i have un-spoken wars with each other and im tired of her complaining to him.


basically, i've been close with this guy since the summer. he asked me out but i said no bc i didn't like him as anything more than a friend. he just got back together with his ex gf and she doesn't like me. she's really jealous that i'm close with her bf and it bothers her we talk. i'm afraid i'll lose him as a friend bc he's already acting differently towards me. how can i get them to break up?How can i break up my friend and his gf?
It's my sis who told me to write to you,ie whoever you are.Listen it's not a good thing and all to do such things.all i can tell you is to do this the easy way.Just tell him open heartily,unless you are guilty of yourself.......think ..........Change Yourself.....................