What I think is happening is First he doesnt want to make you angry at him, and that he is so ashamed that He doesnt think that if he tells you that you can work things out. So what he does is keeps lieing to cover up other lies and now its starting to get out of control. Its hard to go back to the beginning when you are so affraid of what might happen.
If he just came clean I think that he would find out what a wonderful person that he got lucky enough to marry. Anyway keep your chin up.