Most Helpful Girl
I know this sucks. My boyfriend broke up with me basically for the same reason months ago, I tried to talk to him and get him back but unfortunately, usually when people make up their mind their is no convincing them otherwise.
I would just leave her alone, focus on yourself and to move on. If you need to talk to her to get closure, ask her. But then, move along. If she wants to get back together truly, she will come back to you on her own time, not because you convinced her.