My advice is to attend al-alon.
Read the book Co-Dependent No More
Read the stickies at the top.
Keep posting here at SR.
Figure out what your boundaries are regarding drinking, being with or around him when he is drinking, specific behaviors. Boundaries are hard - you might need to look into those more. Post if you have questions. He is surely going to start drinking again so be prepared.
What do you need from a relationship partner? Make a real list. Is this man, as he is today, fulfilling the items on your list? What about when he drinks? Dating is about getting to know a person, finding out if they are a good match, and if they are not you set them free. You keep looking. You can't change him. He is who he is.
Welcome to SR. There is lots of support here. More good peeps will be along soon.