Nicole, you are going to be fine. It is going to take a long time. It is going to be painful. It won't be fun. You will come out the other side, though.
Now you KNOW there's going to be no reconciliation. You can let go of that hope, and move on with your life. It's so hard, I know, and I really feel for you.
He's doing the typical WASpouse thing though, where he says "it can be easy or hard, it's up to you." He wants it all. He wants the divorce, and he wants it to be easy. I'm not advocating making it unnecessarily hard, but he will probably classify making sure you get what you deserve as "hard". Tough. Stick up for yourself and D.
I think you are exactly right, though, about grieving. We've suffered a significant loss, and it takes time to get beyond it. I think in some ways it's harder than being widowed, because the other person is sometimes around, and we get reminded of our loss and our rejection every time we see them.
M:23 T:26 Me:53, Wife: 60 S:18 D:16 filed 7/16 W moved out 4/28/17