The first meeting after my H left was also at a restaurant. I was so nervous and I guess my expectations were to high!
Remember to have no expectations and let him do most of the talking...reaffirming what he says is a great idea! Keep your cool if he says things you may not want to hear. That is where I made my mistake...H told me he was not coming back, ever so I begged, pleaded etc...I did not make a scene but it was a miserable dinner, I didn't even eat.
I found DBing after that and started right away. I took hold of my life and did a pretty good job being a single working mom! H saw all this and realized I wasn't giving him the time of day unless he called me...and even then I always kept the conversation about the kids.
Good news is H and I are working on rebuilding a stronger marriage! H has been home for over a year now and things are good. H was your classic MLC and lived a life that did not include the responsibility of wife and children. I guess the "newness" of the OW wore off and H realized even she wasn't making him happy.