I need to review your thread, but IMO, if you are in contact...that is not being "dark". One can be detached without being dark.
I believe that any pursuing the WW is not good b/c of her mindset. Filling her tank would have been wonderful before you reach the point of her walking out. After that point, IMO, things need to be done completely different. For example, bending over to be nice....like saying "have a good day", is too much. I know, it sounds like good manners but to a WAW....it's too much. Giving her compliments can surely be seen as pursuing. Those things either put pressure on her or it turns her off. You don't want to do either.
One can be friend-ly without being their best friend. For sure, don't gush over her.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!