T, I know you've been through a really crazy roller coaster with your W, but the upside is that at least she is showing interest in you. It's been over 16 months since BD for me and I get zero interest from my W, if she said something like your W did I think I'd have trouble doing anything than standing there with mouth gaping open. It sounds like you're taking the right approach, but just a quick reminder, let her do all the pursuing. Maintain your distance. Work out your boundaries if you haven't already and if you decide to tell her you're willing to work on things, then present the boundaries to her and make it clear what the ramifications are if she breaks the boundaries. You've done all the hard work, now it's her turn.