Man, look on the bright side. She slept in the same bed with you. She kissed you on the cheek. And you have some meaningless sex to look forward to once a week. That's hell of a lot more than what others have going on in their broken marriages.
(But don't let all that go to your head -- I think detaching is still the best thing to do.)
Me: 50, MLC/WW 45 Young kids Nov 2015: BD1 Apr 2016: BD2 Jan 2017: W filed Feb 2017: D final