I'm sorry he has to be away. That is so hard.
Talk to him about how you're feeling about the time he'll be away. And ask if he would clarify the definition of an emergency. You could also ask if you could call once on a specific date and time and see if he might agree to that; or could he call you?
We'll keep you company here and on the psychotherapy board too!

We often help each other in that way there.