I'm an alcoholic.
If he's not ready to confront the truth and start to change, then he won't.
It doesn't matter how much he loves you or the kids. That doesn't change, but addiction takes over everything.
I love my son more than anything in the world. But when the craving for alcohol came, suddenly nothing mattered any more but drinking.
Please don't think along the lines of "But if you loved us you wouldn't drink!" I love my son immensely but spent a long time kidding myself I could keep drinking and somehow balance that with being a responsible mum. Of course I fucking couldn't, but that's what I wanted to believe. I didn't drink because I didn't love my son. I drank because I was an addict.
You might as well say "But if you loved me you wouldn't have diabetes type 1/depression/ASD/anxiety" etc. It doesn't feel like a choice at that time.
I am now getting help and recovering, and there is a lot of help available on the NHS. But I had to make that appointment at the GP myself, and attend it, and then make a self referral to the addiction support service, etc.
I now go to appointments every week there (groups don't work for me due to social anxiety) and a few weeks ago my counsellor told me "you may be drinking more than you want - but you're still showing up here, and that tells me you want to stop." She said a huge percentage of people turn up for their first appointment and then never come again.