Jeff,
I don't know how much advice I will have for you since my H and I are very recently separated (only day 3). It is different for everyone, but in my case I believe a separation is what we needed. For me, I am practicing the LRT, which involves lots of NC..because H had already filed for D.

All I know is that my H always told me he wanted space, he needed time to sort out his feelings and that being around me everyday made it difficult (like your W said to you)

It was very hard but I got up the nerve to ask him to leave. Very scary, but I felt like I was not listening to his needs by trying to get him to stay in the house, so I just let him go. I can share with you what other have told me and that is:

When the separation happens, its very important to not pursue even more then ever. Keep conversations light when you do talk and always try to be the first one to end the convo. Don't accept every invitation, and don't answer every single time she calls ( I need to work on this one in particular) Separation will be a good time for you to continue with your GAL. Make sure to be busy and have plans ahead of time. I suppose it ties along with the same advice as other DBing techniques...but I hope that helps you some

Itll be easier to give you advice as you go along and find yourself in certain situations. I post everytime I have a question and am not sure what to do...but as with everything else its all about finding what works best for you and W