I really struggle when my T leaves too. It’s an awful feeling and I’m sorry you’re in this place right now.
My T doesn’t email back (he has his admin text me to let me know he got it). He makes sure I have crisis hotline numbers in advance, so I “can’t” even contact him in an emergency (I mean I can contact him, but I’m betting he would direct me to one of those hotlines).
Apart from it being a safeguard for him to maintain his own work-life balance, I think he also knows I’d read into ANY email response he’d send back and it would only go downhill. As much as it sucks, he encourages me to view it as an opportunity to show myself I’m stronger than I think I am. Of course I want to punch him when he says this, but he’s right.
It really is the pits though and I’m sorry.