Hang in there. It will get better, but you have to keep working on it. Keep working on yourself. Detachment is a process and we are all at different points. It sure sounds like the two of us are in nearly identical situations with spouses who think they are done, but no affair, no kids, 7-8 years together. I feel the same way about my wife as you do - she is beautiful, smart, funny, caring (and also in the throes of a MLC). You can recognize all that and still detach. In fact you need to keep working on just that.
W 34 Me 42 Married 7 years together 8 0 kids 1 beloved dog BD 4/6/2018 I moved out 4/7/2018 I moved back in alone 8/05/2018 I file 3/06/2019 D official 5/7/2019