We've all been there, my friend. No need to apologize.
I know it hurts to see W's new place. It feels so permanent. While she might be enjoying it now, wait until it loses it "new car smell" and she starts to get her bills and come home stressed out from work to have to make dinner etc.
The WAS's think its all a bed of roses and then the realities of life punches them in the teeth. The grass isn't always greener.
Keep taking those baby steps towards being the best you possible. And don't look too far ahead, today has enough worry in it to keep you busy. Stay in the now.
You're going to be ok, even though it feels like it won't be.