Jeanie,
You can do this. Today was a terrible day. It knocked you down.
Now, look up! Your HP is waiting to help you. Your children need you to protect them.
Leaving children with an active addict is simply dangerous. Please believe everyone on here about this issue. They're your babies! I don't think anyone is suggesting he would hurt them on purpose but when people are using, they don't make good choices. You would have no idea if he exposed your babies to drug dealers, or if he passed out and wasn't able to care for them, or if he were driving with them while high....The list goes on and on.
I know you're not ready to write him off yet but if you and the babies can separate from him, you'd be a lot less stressed.
You can't save him.