If somebody I were dating told me that they were dating a model (or some other enviable type), it would not convice me to get back with them. Especially if I were the one that broke up in the first place or had been hurt by the person. In fact, it might make my resolve to stay out of the relationship stronger; I don't enjoy games. And, even if you truly started dating a model, I would question your bringing that up first thing. Why is he telling me this? Is he trying to hurt me? Is he trying to make himself feel better? Do I even care? What an @ss, etc.

Nobody can tell you the right way to go about this situation, because each person will react differently. I believe a calm, rational, sweet approach would probably be the best means, though it might not work. Desperation is not generally effective, and when it does, it may be a false resolution. Simple (not stalking senario) reminders might. An honest conversation about your feelings might do the trick, if you can get her to talk with you. Many women want men to be honest and vulnerable, but we don't want weakness. Sometimes, the line between vulnerability and weakness is fine.

And, if you broke of the relationship without good reason, how would she be able to trust that you wouldn't do it again? Honestly, she may not. Alternatively, she may right off or she may take some time to rebuild her trust in you. She is human and must come to an understanding of your intentions. If she feels that you are mercurial and will remain that way, she may choose to move on. If she believes that you want to get back with her just because it will be the easy thing for you to do, she may not be interested either. Really consider why you would like to be back with her. If you are able to come up with honest reasons for your decisions and able to express your love on top of that, you may have a winning case.

This is my out-take on the situation, from a woman's perspective. I realize that this may not fit your situation at all. To boil it down, if you respect her treat her with honesty and stay away from games. Games destroy many relationships.

Good Luck:)