I feel a little strange today. I feel like I am losing my desire to R my M. Not only that, I am questioning my love for my wife.
Is this what detaching feels like?
Yes, it's part of detaching. A big reason you are losing desire is because she is hurting you. The key is getting ahead of her on the detaching curve. Once you think you will be OK without her the real changes begin, this is the "dropping the rope," no expectations, and you walking away. This done in a healthy way is productive.
M22,H45,W45 S21/18D12 Retain faith that you will prevail in the end, regardless of the difficulties and at the same time confront the most brutal facts of your current reality, whatever they might be.