That's kind of how anger is, isn't it? Anger can be a healthy emotion as long as it doesn't go too long. What you want to learn is to let go of the anger. Regardless of why or how, you do need to let it go. It's not easy. And it has to be done regardless of the future or non-future you and he have. The anger only hurts you and your kids at this point - you can't hurt him any more than he is hurt. That's the irony. The difficulty is not having the perception of any kind of control. You can't "fix" it. Only he can. But you can let go of the anger and you can detach. You will at some point; the question is whether or not you let him have a way home or not and when you let go of the anger.
Be angry. Just don't let that anger hurt your children or specifically their relationship with their dad. That's lasting hurt that you do control.
When you are ready, let the anger go. Actively work to let it go now else it will be longer.
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."