Fighting4wife, I am not completely aware of all the details in your situation, but I'll give you what came to mind as I read your post anyway.
Yes, be affectionate with your W. Not in a pursuing kind of way...you have to be very, very careful to walk the line and not cross over into needy or pursuing. Just casual affection, and initiate sex if you feel like it. I am basing my opinion on the idea that if you are distant, she will find it easier to decide that leaving is the right decision. If you are cold, distant, argumentative, anything negative....she could find it easier to leave. If you are clingy, pursuing or needy she may also find it easier to leave. It is imperative that you find a balance. For instance, do something affectionate and THEN LEAVE IT, leave the room, leave her alone. Keep the connection alive, but then just leave her alone to process what it means to her and how she wants to react.
My .02
"Happiness is a butterfly, which, when pursued, is always just beyond your grasp, but which, if you will sit down quietly, may alight upon you."