Stopping for your kids is a good enough reason.
It is essentially stopping for you too because, YOU don't want your children having a drinking mother. So, it is for your serenity.
As for your partner, leave him off for now.
If he is not willing/interested in stopping, so be it.
Go ahead and get sober yourself.
Harder, but by no means impossible.
Have you considered AA? Or, some other support?
Take it one day at a time.
Today, I will not drink.
Tomorrow, start again.
Welcome to SR.