All is fair in Love and War. You're not married, She is not married. I say do your friend the same favor he has done to you and go for her man. Be tactful, be honest, tell her exactly how you feel and use the charm you have that she loves and she will be yours. You will either win her or lose her. Thats the way love goes. If you dont take that chance you will never know.
This is good advice. Listen to this song below.
Tell her about it.