I agree with anvil, childhood issues have everything to do with relationship issues in adulthood. For me, there came a time when I just stopped and said 'I am an intelligent, educated woman. How in the world did I get myself in such a mess?' It was then that I gave myself permission to look at my childhood, my parent's issues, and how those things affected the choices that I made. It really isn't about blaming; maybe your parents did the best they could at the time. I have no doubt that my own children were hurt by my codependency because we have talked about it.
It is about acknowledging that the child that you were was hurt by things that happened, and that the hurt you felt influenced the way you look at life and the choices that you made in relationships.
I really don't think true recovery began for me until I accepted these rather unpleasant realities.