I have read where several LBH's feel the same as you've described and they say it is due to the detaching. On the other hand, if love is a choice, then a person can choose to love that person who they are M to.....either now or later. I think that not only have you discovered that you can be detached and even think about a life apart from your W, but probably those deep hurt feelings aren't ready to come out to be hit on again. I only hope that you won't be afraid to love again.....whoever that lucky person may be. I also believe that when you begin to see changes in your W, that will do so much to help your feelings toward her.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!