Yeah this is utter BS. If he 'really really' doesn't want a D then what's he doing about the 'getting along' part- whatever that means?
Tell him actions speak louder than the words so when he checks himself (and you) into some kind of Retrovaille like program you may start believing him. Right now you don't trust him.
Look, the thing about marriages is it's a committment to work together. There will be lots of ups and downs in life especially when you will have kids etc. However, some people are always looking for that initial spark and the 'happily ever after' life. When the spark's gone they become bored and start straying. They want that constant 'falling in love' feeling which after 10+ years fizzles out, what remains is the trust, the bond from raising a family together etc.
So what do you want to do?
Me: 35|WAW: 38|D: 6yo | http://tinyurl.com/2dxx7m6 Feb 2006, left, came back in two weeks Aug 2006, left again Apr 2007, filed for divorce Dec 2007, reunited Mar 2010, moved out, filed again