Hi orinoco,
re your comment:-
"And if he is going to get the help he needs I want to help him do it rather than leave him on his own"
But you cannot do this;that is enabling and protecting him from the consequences of his actions. He has to want to seek help for his own self and at present he does not. Actions speak louder than words, he's already cancelled two appts. He may never seek help either, there are not guarantees here when it comes to alcoholism. If the rest of his life goes to poo because of his drinking then that is his choice, you did not cause that to happen. It is his choice, he made a conscious choice to start drinking.
Like it or not, his primary relationship at present is with drink. You, your DD and everything else comes a dim and distant second even if you are on his list of priorities.
In the meantime you enable him by being there and exposing your DD and you further to his alcoholism. Alcoholism as well thrives on secrecy; it does you no favours at all to keep this a secret from family and friends.
You certainly do not want your DD growing up thinking all this alcoholic dysfunction at home is normal. You cannot fully protect your DD from the realities of his alcoholism and she will notice far more (and your reaction) as she gets older. You can only help you and your DD at the end of the day.
Your post is mainly (as is common in these types of situation) about him, not you. Alcoholism is a family disease, you need help and support as much as he does. Am very sorry to say this as well but you as his wife are actually the last person who can help him.
Do talk to Al-anon; they are very helpful re family members of problem drinkers.