Most Helpful Girl
Sometimes you have to walk away and let people make their own mistakes. It's quite obvious that he isn't that engaged with his existing children so I wouldn't hold out much hope for him being a perfect father for your child. We can all try our hardest to help the ones we love but quite often they don't want to change, and until they do it will be virtually impossible to get him to stop. You just need to do what's best for you and that child which probably means leaving him completely. Your staying isn't helping, but maybe your leaving will.