Why did i let him humiliate me?

Simple. Because you let him. You have low self esteem. Stop playing the victim and take control over your life. Why live so unhappily why he goes and gets his jollies off with other women. He obviously doesn't care, and just saying "he's a man" is the most pathetic excuse in the book. Not all men cheat. In fact, if the man is in happy marriage, he would have absolutely no reason to want to even fathom the thought of cheating. And if he has a addiction, and claims he can't help it, well than, do you want to live with someone with a sick addiction like that? That's not fair to you. It's your life though. Only you can make your choices. Nobody else can make them for you -- although apparently you seem to be letting this no good husband of yours do that.