Upwards, as Breakdown said, situations like this truly are a roller coaster. I'll admit, I've cried more times in the last 6 months since my W left than I ever did in the entirety of the rest of my life.
I think for your health you need to try to detach from your H as much as you can. I know from my own experience that the more you tie your happiness to another person, especially one that doesn't seem to care much what they're doing to you, it can be brutally hard.
The other thing to keep in mind (this may not make you feel much better) is that what you're going through emotionally is totally normal. Facing the loss of a spouse and a family unit is one of the hardest things anyone can go through. You might need to just let yourself be sad when you feel that way, don't fight it. Take time for yourself to feel what you're feeling.
Me-40,W-37 D7, D5, S3 Separated Oct 3/2013 T 11 YRS M 7 YRS