Pegasus, he may not accept this easily, but then again neither did you.
You have given this great thought, considered what is best for you and your children, and even then reluctantly got ready to move forward.
It takes courage to change, but nothing changes if nothing changes.
And as someone whose father died when I was 6, I recognize the need for a father...but not an actively using addict. I may have been raised by only my mother and we may have struggled financially at times, but I was raised in a house filled with love, a house that was safe and peaceful.
My heart and prayers go out for you because even though you are thinking clearly and trying to do what is best, I know it may very well be the hardest thing you have ever done.
Hugs