One of the things about co-dependency is that we end up trying to control the uncontrollable. Our lives become consumed with coming up with strategies for trying to make that happen and the resentment that builds when we fail.
Trying to control the drinking of someone with a drinking problem is just such a futile situation. Once he starts drinking he can't reliably control how much he's going to drink or the consequences that arise from that. If he can't reliably control his drinking, you don't have a hope in hell of controlling it for him. He will see your attempts as nothing more than you being a killjoy control-freak, out to spoil his fun.
The term "alcoholic" means different things to different people. There is no single definition. But let's look at this another way. When he drinks, he tends to drink heavily. When he's been drinking heavily then bad things tend to happen - spoiling evenings out by falling asleep early, by causing drunken arguments, by experiencing anger and resentment from his wife.
He knows that his drinking often (albeit not always) ends up with bad stuff happening. And yet he continues to drink. What his actions are saying is that although he might not want those bad things to happen, he's willing to take the risk provided he gets to continue to be able to drink. His drive to drink is stronger than his desire to have a happy wife. As you yourself say, his love of booze is stronger than his love for you.
That is a sad and bleak realisation to come to, I know. When I came to the same realisation about my ex I decided that I'm worth more than that. I'll come second place to the kids but I'm damned if I'm going to end up in second place to yet another bottle of wine. It's not an easy decision to make though.
I'm really sorry. Trying to raise kids with someone with a drink problem is bloody depressing and horrible at times. Melody Beattie's book "Codependent No More" is really good at helping us to tear our attention away from the drunk in our lives and, instead, to focus on ourselves and what we want. I recommend it highly.