Keeping it light before breaks is kind, so we aren't left an emotional wreck and without support at that time. Sounds like it isn't what he wants either and he's admitting it's hard for him.

About the 2 emails: that might not be about you really. It could be that others innundated him with emails so he set a boundary about that for himself and is applying it to everyone.

It sounds like the interruptions are making therapy difficult for now. It sounds like you want to be back into a routine with him and that you're missing him, maybe wishing he wasn't going off for 2 weeks. I hope when he's back and you and he get settled in that things will feel more comfortable for you.