When I was that bad, I kept myself away from people I liked/ loved/ cared about... For several years.
I didn't have a family, then, and also didn't know about treatment. I was fine. (Nope!) This was just how I was, and I needed to learn to live this way. So I thought at the time. It took me about 5 years of living in chaos before I taught myself the things people are taught in months. Your husband really has 2 choices... Get into treatment, or be a risk to everyone around him for the foreseeable future (I got lucky with 5 years, some go decades). You can lead a horse to water, but if your husband is choosing not to get treatment, he's choosing to put you & your children at risk.
We make the decision as parents to walk out in front of oncoming traffic for our kids. This is your oncoming traffic. First protect your kids & yourself.