Sometimes it pays to shut off the crazymaker and just relax. Seems like maybe the 'friend' status is doing that for you. Stay with that for a bit. Use the extra time/energy/peace on yourself and your Rs with your kids.
Meanwhile, XW will hopefully use the same space to work on herself/figure stuff out.
I agree with Bulldogr. She didn't verify that 'its over.' Let that be and focus on yourself. And enjoy that friendship with her, as if she's a new woman just blown in from out of town.