She texted me that we should break up. I'm calling to make amends. She didn't want to tell me why we broke up, but she kept crying. What should I do?

Think about whether there was any contradiction or disharmony between you before, and think about whether her language expression was abnormal for a while before breaking up with you. If you know her friends, you can also find out what is going on. Something must have happened to her. Please comfort her and try to let her speak for herself. Are you far away? If not, you'd better go to her directly. If you talk face to face and be honest with each other, something will come to fruition. Come on!