So move forward FIB, as you feel you need to. But if you're really allowing that "back door" to remain ajar, you're going to have to clean up some things in your heart. If you really ARE willing to acknowledge an honest effort on her part, you can't be in a state that causes you to see everything she does as manipulative. In the end, any effort she makes must be manipulative in some way, at least to the extent that she would be trying to convince you that she wanted to try to work things out.
There is a lot of wisdom here.
sg Love is PATIENT, love is KIND, LOVE never fails / DB since 2001