Hmmm, forget it. You seem like your too jealous for a relationship with this girl, and she will sense it anyway. Apart from that, the fact that your great friends with her makes it even more difficult. She will only ever see you as a friend. You should have made your move sooner. I think you have blown it. But maybe just try and get one last chat with her and ask her if there ever could be a you and her. I would try and stay friends with her though, incase she falls out with her new guy. That way she will be all emotional and you can make your move then...