My only concern is you say you're going to take it slow and I think you already had this mindset before you went to dinner with her, however, then look what happened... she slept over.
So if you say you're going to take it slow then I would really stick to that. This is why I see going darker as a positive for you because it's really easy for you to get drawn in really quickly. You've already shown that by your recent behavior and all the trips you two have been planning together. Does that make sense?
I am in no way trying to judge your W. I don't think anyone is. We are concerned for your situation because you really have so much hope to turn this around.
Me: 32 H: 32 M 9 yrs #1 D7 #2 S5 #3 D2 Bomb 8/12/11 H moved out 8/14/11 PA started w/H & OW in 1/12 - found out 3/24/12 Got my own place 8/25/12 H & OW move in together 9/15/12 Still married.