What do you get out of this relationship now?. Must be something, you are still there.
Not all alcoholics have to drink every day or live their life on a park bench.
What is your definition of an alcoholic?. It needs refining and I think you have normalised all this at great emotional cost to your own self, not just your children.
The 10% when to your mind he is not fine is just the tip of a bloody huge iceberg. Alcohol is a cruel mistress and you are playing second fiddle to that.
Your H's primary relationship is with drink; everything and everyone else comes a dim and distant second to the drink. Many such relationships as well have codependency elements within them, I would also suggest you read Codependent No More written by Melodie Davies.
Your role in this marriage is now primarily one of enabler; you have and continue to facilitate your drinking by being around him. You helped him today for instance, you've carried him now for a long time. How many times have you made excuses or covered for him?.
How many people know he has a drink problem?. Alcoholism as well thrives on secrecy.
You cannot help him, you can only help your own self here and Al-anon is a good place for you to start. You and the kids are as much caught up in this as he is I am sorry to say.
You cannot solve his drink problem for him and you can make him talk and he could promise the world but unless he himself admits to having a drink problem nothing will change and even then he has a long and hard road to follow; a road you cannot join him on.
There are also no guarantees re alcoholism; he could go onto lose everything and he could still choose to drink even after all that. Nothing that you write is indicative of him admitting there is a problem; he like many alcoholics is in denial. Also you write he underestimates how much he is drinking; alcoholics do that.
Where are the consequences for his actions; it is easy to go into denial yourself and bury your head in the sand like you have done but you cannot do that indefinately. Your children are picking up on all this even if they do not see this directly. They as well as you are being affected by his drinking.
You have a choice re your H; your children do not and they are growing up in a household where one of the parents has an ongoing and long term alcohol dependency issue. He is a functioning alcoholic but regardless of the label he and you are teaching your children damaging lessons.
He cannot stop long term; what is the longest period of time he has gone without drink?. Two months without alcohol is the blink of an eye.
The 3cs re alcoholism which you will do well to remember:-
You did not cause this
You cannot control this
You cannot cure this