OMG CHRIS!!!! You sitch sounds so much like mine! You've even been together and married nearly exactly the same length of time as us. Like in your sitch I knew we had problems but never imagined it would come to this! I too thought my H was more committed than I am finding out he is.
You have my 100% support and I hope that you are able to turn this around. I wish I could give advice but I feel like I'm in no position to do so since I feel like I'm such a mess myself. BUT...there are some great people here that I know will be able to give you good advice.
Me=31 H=36 D=4 H dropped bomb and moved out=4/17/08, living with his mother 50 minutes away from home and work.