well what I am saying is that anytime she brings up talk of possibly getting back together again, you tell her that it sounds like a good idea but she got you used to living apart and this whole divorce idea so you're not sure anymore if this is the right thing to do right now, you're not sure how you feel about you or her, being married, etc. you've gotten accustomed to the idea of a single life and being a single parent and you've adjusted and you've maintained a decent attitude throughout all of it and maybe you need some space and time to think about things.
It's a soft rejection, since she flip flops on her own idea several times, you start doing the same and watch her push the idea of getting back together with you even stronger than before. Let her come up with the reasons why you should be together and work it out.