For what it's worth, I think you did ok last night. You should try and extinguish all feelings of giving up just now. You're a long way from that.
I'm going through a separation at the moment so I know how heart breaking it is for your W not to understand how much you really want to work on your M. No matter how much you believe that it can work out, it seems their minds are already made up. My W told me that she had no feelings for me anymore either. It hurts like hell I know. In a way, I'm hoping that the separation might help me a bit because I know it wasn't working when we were still under the same roof. For your sitch, it sounds to me as though your W isn't 100% sure of herself. you know your sitch better than I do though.
I'll keep looking in to see how you're getting on. It does sound as though you're in a similar place to me and I know how awful a place that really is.
Me: 32, Wife: 22 Son: 2 Married: 2 years Separated: January 5th 2009
Sometimes you have to become lost before you can find yourself.