Flower Girl,
You need not feel guilty. We all look back and ask what if ? It is a disease. What you did or may have done did not create the alcoholic any more that your ability to create cancer in him. Guilt comes with being a parent. If any harm was caused it was not intentional. I am not sure how religious you are but I read an expression which I think brings comfort when guilt or pain or shame grabs hold of us
God knows the difference between weakness and wickedness.
It is not wicked to be a frightened or nervous housewife and mother. The mistakes of staying to long (if it was) was done with love and the best interest of your family in mind. There should be no guilt involved in that.