Thanks for your responses. I just read the DB Quotes thread, and it was very helpful for me with regards to keeping perspective.
Part of what I think is so hard about all this is the loneliness that we probably all feel going through what we all know is a difficult process.
I'm going to take it day by day, and pursue what makes me happy and what makes me better. One of the things I've always known about myself is that I'm brave, and I'm willing to ensure some pain when I can stay focused on the reward at the other end of the battle. So I will do that.
By the way, I brought up my feelings tonight prior to her leaving, simply addressing them as "here's how I'm feeling, and I just wanted to share it with you." No obligations. She said, "How can I help you feel better about this?" and I mentioned being home at a reasonable time. She texted me then, on her way home, and is now in bed with me at a reasonable time. Though she's asleep. And I'm typing. Haha.
I'm going to come out of this better than I was before, in many ways: -a better husband -a less critical person in general -best physical shape of my life (and I'm an ex collegiate athlete, so!) -more patient -more faithful with my religion -a better, more engaged father (and I think I do a good job already) -in better financial shape -I'm going to pursue more hobbies that I've let go over the years