What can i do to win her back?

Ok so my girlfriend dumped me about 2 months ago and I've been try to win her back. I'm crazy another this girls. She's amazing. Before we started dating we would talk all everyday and hangout. It was great. Everything seemed great when we started dating too until one day she said we had to talk. She broke up with. She got a new boyfriend like 3 weeks after she dumped me. She dunped me because she said I don't understand her. She said this to her friend recently."you dont khow how awful i feel about hurting him and yet how angry i am because he doesn’t understand. anything. you don’t know how i’ve spent literally hours explaining myself to him and he doesn’t understand that we have basic communication issues. he doesn’t understand who i am, he just says that he’ll love me know matter what. i don’t need unconditional love if they don’t know what they’re loving." Please someone, I've never felt this way about anyone before. I need to get her back. What can I do???