I'm so sorry you are going through this. I hope you realize that her behavior is totally irrational and confused. She definitely hadn't made up her mind about anything, and is very confused.
She is emotionally sick right now. Don't let her drive you crazy - it's not about you. I promise.
I am in the same situation btw, so I understand everything you are going through. My fiancé also said that he was trying to find feelings for me again, but that is impossible with an OP sucking away all their emotional energy.
Engaged Aug 2009 Fiancé had doubts Jan 2010 Happily re-engaged July 2012 Discovery of affair July 2014 Separated July 2014 Fiancé is confused about whom to choose Chose the OW Oct 2014