Congratulations Surfbee, on your impending bundle.
Regarding the alcoholic, it is more important than ever that you focus on seeing and accepting him for exactly who he is and letting go of what you wish he was or hope he can be. It doesn't mean you have to stop loving him or wishing the best for him. But you need to accept what he's capable of and what he isn't, because baby is going to need to take front and center in your life from now and through the foreseeable future. You have choices about what you allow in your life; baby will not.