What reason would someone have for not wanting a divorce..?
1 She has economical reasons. A divorce always asks money, and if the economy of your ex’s has based on shared money (and if your partner has been responsible for remarkable part of it), this can be an important aspect. 2 She is emotional uncertain. Your partner, no matter which reason has led to the end of their relationship, is still remembering your partner. It seems that, after awhile, people forget bad things and remember the good ones. Your partner may still be in some peculiar way familiar for her. I think that you have to wait. Time is the best medicine at least against the symptom 2.