Yes, GW, but that is the part about detaching that you've got to work on. Believe me, I know how hard that is. That was probably the hardest part for me, and I don't know that I ever really did a good job of it. But, the DB "vets" will tell you that you need to detach yourself emotionally from letting YOUR evenings, your mood, your day, etc. depend on what direction she takes that roller coaster. You need to work on "acting as if" you are fine, you are strong, you are in control, no matter what she throws at you.
What I learned to do is "act as if" when around H and go into the bathroom when I needed to express some emotion, or couldn't quite keep it together. I would pull myself together, get back out there and "act as if" some more....
You need to remember that you are a strong, confident man that she (or any other woman) would be blessed to have for a husband. You need to project that... not in an arrogant way, but with quiet confidence. You need to remember that you will be that man regardless of the outcome of this, and regardless of whatever she chooses. No matter what, you will be ok, and you will be a great dad. No matter what. So, don't let her moods dictate your well-being.
Ride that roller coaster with that confidence in mind.