We're here for you gb, and if you can get through this pain your life will become so much more promising. Although you're attached to this man, he wasn't good for you and as hard as it seems now, he made the right decision. He wasn't going to stop drinking; did you really want that in your life for the next xxxx years? Think about the logical outcome of that dynamic.
Have your cry, feel lonely and abandoned, but remember you will start feeling better eventually. Do something good for yourself every day, even if you don't enjoy it at first. If you can keep the future in mind and look after yourself your hard work will pay off. This isn't forever.