I think what you should do is a lot of reading around here on this site. You'll see that what you are going through is not at all uncommon. Maybe you'll realize that you cannot change him and that he is an adult and if he wants to drink, he has the right to drink. Likewise, you have the right to decide what you will and will not put up with in a relationship.
Welcome to SR! Glad you found us. Spend some time reading the stories of others just like you. You'll find a lot of support here.