Hello Monokuma: Well... from what you wrote... it sounds like you've apologized. From my perspective, I doubt there's anything you can do to make her change her mind. And continuing to try to get her to do so runs the risk of alienating her further still. My thinking with regard to this would be that the best you can do would be to simply wait & see what happens.

Assuming that you really want her back, let her know that you're there if-&-when she changes her mind. Perhaps send her an occasional text message, e-mail or card so that she doesn't forget you altogether. But continuing to actively pursue her may simply drive her further way. Oh... & stay away from the flirting, sexting & phone sex! You promised not to do it any more. So it's important to be true to your word.