Second Thoughts

Last night my daughter came over, and she said her dad has "cut down" on the drinking.  She says he is feeling better, and seems much more positive on life.  Why does this immediately make me believe he is going to get better?  I know as I type this that he is an alcoholic, and he can't just cut down on the drinking.  I know I do not love this man any longer.  I know my codependency recovery is not going to happy as long as this man is in my life.  So why do I get these stupid second thoughts about my decision and all of a sudden feel the need to get back together with him?  I know it isn't the right thing to do, and I am not going to do it - but this feeling is making me crazy!