I know that W is fishing for some sort of commitment from me but I'm not sure why. It almost feels like she wants me to commit to being with her while we live apart. That makes zero sense to me. We break up, but not really?
She's like a monkey swinging from branch to branch. They never let go of the last branch until they have a firm grasp on the new one. Whatever that new branch for her was when she left you has turned out not to be what she thought it was so she wants to come back. First she's going to make sure that you're all-in before she let's go of the other branch.
As much as I'm pro-marriage I see by your signature this was her third strike. Doesn't that mean she's out?