Hey there, I just want to start out by saying I second the advice that Curly gave. Also, I think that you need to have him help you out more around the house- it might help bring you guys closer- and also, no offense, but it sorta sounds like you're a bit of a doormat. I should know, I used to be one.
I can see that he has a fidelity issue, and he took you for granted and now regrets it. It may take him a while to warm up to you a bit. Perhaps a couple counselor might be a good idea? Good luck.