Why are you posting this on the Staying & Improving board?
Are you hoping that she will suddenly change and not be like this:
Essentially, she is undecided about working through our problems, what the heck?
You have to realize that this disorder has the distinct effect of a relationship sabotage pattern.
She's already nuked it, right? (I don't know your backstory, I only post & read in Staying)
Another effect is the lack of responsibility for nuking it. My dear uBPDw always angles to get me to leave her during dysregulation episodes so that she will not be at fault, she will be the poor abandoned oppressed victim that her disorder is constantly telling her she will be.
It sounds like your Ex's waffling may be simply self-defensing against your "accusations" which you may present as rational discussion but this is BPDlandia and rationality is not a strong emotion around here.