What should I do with her? 10 pts best answer?

Okay, so my ex-girlfriend dumped me approximately 6 weeks ago. The reason why was because I didn't treat her so good here and there, due to a bipolar disorder. For the past 6 weeks, I have been trying to get her to realize I changed and I am such a new amazing person, but she still refused and wanted to move on and find a new boyfriend. She said she has no feelings for me whatsoever and no interest in me more than just best friends. So, after SO much depression I've been going through because of the break-up, tonight, randomly, I get a text from her saying how much she is sorry that she broke my heart and that she wants to try another relationship....what should I do? Should I say "Nope, you broke my heart, now it's yours, and we're OVER" or should I say "I understand, let's just forget the past and start nice and fresh?" We dated for 3-4 months.