My Advice: Keep going to her about you. Your codependency needs to be addressed. I suspect you didn't tell her about your own history of staying with someone you didn't even love for so long that you cheated several times on her instead of leaving. At least get to the crux of whats in your own mind while you seek unbiased couples councelling from another councellor.
I suspect if you don't get into what's going on with you, then you are going to just keep finding women that aren't all that good for you. Ones you feel you need to change in order for you to be happy rather then ones that don't need changing because they make you happy the way they are.