I'm in a similar sitch, although further along. I read book after book on saving marriages, went through a program that stressed reconnecting with W through regular calls, touch, date night, etc. I pursued and pursued until W finally moved out in October to get some space. What did I do? Pursued some more.
Thankfully I found this site near the end of last year, and have been DBing since early January. It's tough, really tough, probably the hardest challenge I've ever faced. But I can say from experience that the others speak the truth when they say stop pursuing.
I wish I found this site before W moved out. Please don't make the same mistakes I made.