One big thing I did wrong was enable him for many years. I took care of everything and let him get away with not being responsible for anything, and I didn't include him. And I sometimes used sex as a negotiating tool, which is not cool. And I didn't always communicate honestly with him, and instead manipulated to get the result I wanted. I'm definitely at fault for some of the problems in my former marriage. But I did change those behaviors before he ever cheated on me.
