I'm confused about what you want from him. He manages a bar, so his staying there late every night strikes me as reasonable. If you do prove to be serious about quitting drinking by your actions over time, not your words now, then what? Are you prepared to live a radically different lifestyle from your boyfriend or husband, or will you leave the relationship? Those strike me as your two options here.
I'm not being flippant. My husband and I live very different lives, so we spend some of our free time apart. We have even lived in different cities at times. Even in a committed relationship, it is important to be independent to some degree. You can do this without him.