Please tell somebody else other than just your friend. Tell them to keep it to themselves for the time being but you need the support of others. Others who can be called on in an emergency without explanation.
Do not play his game of hiding his DD and his alcohol dependency. He will minimise it, make you question yourself, was it really that bad? If no one else knows it can't be that bad? He'll spin it round and round until you don't know which way your facing.
Own your part in this, allowing him to drive your kids whilst drunk. That is what he has done probably more than once. It is only luck they have not being injured due to his arrogance, stupidity. Own it and get angry. Use this anger to find your way out of this. How fucking dare he put you in this position, how dare he risk the lives of his kids, how dare he risk others lives. Not to mention he will lose his job. What a Prince hey?
And your kids will not be oblivious. Kids see and know most of what goes on. He's suddenly feeling great? Pretending to be bestDad and husband ever? They'll notice. As you have felt anxious, they have too. As you feel he is easier to handle with a few drinks in him, they will know this too. As you are walking on eggshells, so are they. It's your norm so you are probably not aware of it. Like it was not a surprise to your friend it will not be a surprise to your 17 year old at least. You tell them the truth in an age appropriate way. That their father has a drink problem
and needs to sort it out.
This man needs to take responsibility for what he has done. He is an alcoholic and it is now so bad that he has lost his job over it. It is that bad. It is only luck that he has not caused injury to himself or others.
Until he takes responsibility for his own actions then it's all just lies. Lies lies lies. He will lie to you, to his kids, tohisfamily, to his work, to his friends. He will cover it all up and include you in this coverup.
You cannot fix him. He has to do this for himself.
You can leave him, even though you are working and need childcare. Do not leave the kids with him until he is sober. And sober is not just 3 days of non drinking. You cannot trust him to not get behind that wheel with them in the car.
This is why you need to tell others. So you can get your support network in place. To call on others to help with childcare in an emergency, or whilst you try and find other care.
You can do this. No more covering up for him. Protect yourself and your kids.