I am not going through what you are, but I do have a friend who is in your place right now. She has 3 children, although they are young (6,5,4), and she is still very angry and bitter towards her husband. I just listen to her because she was devastated by what he did, and you have to realize that you are going through, and will go through, a morning, a loss. My dad was horrible towards us and my mom, she finally divorced him when I was 17. She still has some resentment towards him, especially when he does something to hurt me or my sister.
We have to realize that giving into that anger (I don't know the situation) is giving over control to him and his actions. We have NO control over the situation, we only have control over how we respond. I know that sounds so easy, and I know our feelings are so hard to fight, but it can be done. You need to equip yourself, and grow, learn and I believe seek God to heal you and fill the void you must have. There is a book called "Do you think I'm beautiful" by Angela Thomas, who went through a terrible divorce with 4 kids, and my friend is now reading it. You could maybe give it a try. I wish I could just make it go away for you, but sometimes we must go through things to get to something far greater.
Good luck