Are there any good men left?

Eight months ago I married the man of my dreams, or so I thought. He was sweet, romantic, smart, and loved me like no other. Then I find out he has never been faithful the entire 3 years we have been together....needless to say, we are getting a divorce. Are there good guys left? Now that I am going through this I keep hearing stories of other women this has happend to. I just don't understand, I did everything for him....I know I am a busy person as I am working full time and I am in nursing school, but he should have been proud and stood behind me, not went behind my back to find other people. How can a man marry a woman he says he loves all while cheating????