Two week's ago my W emailed me at work wanting to know if I wanted to meet her at Applebees for drinks. So I agreed to me her. Showed up and had a good time. I know my W wants us to be friends if the marriage should end. We started off as good friends before dating, so being friendly has never been an issue. But after drinks we rented a movie, whichever later led to sex.
So whatever small opening your W is giving you, then take it. These W are curious because it is in their nature to do so. At the end of the day they just need to get back that feeling of hope in the marriage. Once that hope returns, then the marriage building can begin. And I'm praying for you as well