Great post, 25mlc. We don't part ways at all - you just better worded what I was trying to say. LMNW, I personally think the bottom line is - learn how to extricate yourself from these kinds of conversations if it isn't productive. If it's starting to go sour, change the subject.
I've also been thinking about your sitch and the feelings she must have from you instigating D. My XW instigated the D and now she's trying to be friends. She actually just wants my friendship without doing anything to earn it, i.e. I should just be there for her, so it isn't a fair comparison. But I was wondering how I would feel if she tried harder. And I can honestly tell you that I could imagine being friends, perhaps, but I've completely closed the door on being in a relationship with her because of the way she acted pre-D. So it would take a LOT of low-level, consistent, pleasant interaction to get past that. At least for me. But it sounds like you guys already have a pretty good relationship, so that's a great start.