Yes, when it settles in that the history you have together for all those years is tainted by that person having A's & seemingly no memory (or at least not the same loving one) of them, it can get you down for sure.
I still believe that your W is on a different planet right now, not exactly moved on, only unavailable.
That's the difficult part I think, keeping the window a little opened should she start remembering in a positive way.
Talking to CVA last night, it's the nights of sleeping alone & absence of affection that's the hardest.