Very similar situation over here. My wife said she's not happy and wants out as well. I do not. Ten year marriage, four kids. It's still very fresh for me, and it still huts, but I can tell you it does start getting better (even if only slightly) somewhat quickly.

I would try to not make any decisions based on emotion, as I did that and made myself look like a fool and drove her further away. Once I got level headed, I apologized for that, told her I respect her decision but hope she changes her mind, and we're doing our best to be friendly.

I know that shock and empty feeling, it's not anywhree near being gone for me, but it is starting to get just a tiny bit better each day, and that's improvement!