Hey, Fizz,
Talk to HER, not to him (and certainly do not email him!!!)! Just tell her that, if she is really willing to give up your relation in favour of a relation with your so-called "friend", she's free to do so - but tell her also that, once she takes the decision, there will be no way back. Tell her that OK, you understood that she took pleasure in accepting the compliments etc. from the other dude, but that now she really has to choose.
Believe me, if she will accept to continue dating one of her boyfriend's "good friends", you won't miss much getting rid of her and you will be a winner.
On the other hand, if she really loves you, she will immediately stop talking to that "friend" of yours - at least until he stops his advances.
All the best to you!
Talk to HER, not to him (and certainly do not email him!!!)! Just tell her that, if she is really willing to give up your relation in favour of a relation with your so-called "friend", she's free to do so - but tell her also that, once she takes the decision, there will be no way back. Tell her that OK, you understood that she took pleasure in accepting the compliments etc. from the other dude, but that now she really has to choose.
Believe me, if she will accept to continue dating one of her boyfriend's "good friends", you won't miss much getting rid of her and you will be a winner.
On the other hand, if she really loves you, she will immediately stop talking to that "friend" of yours - at least until he stops his advances.
All the best to you!