Hello,
I am new to the forum but your story resonated with me as I am going through something very similar. Only in my case, I was the one who moved away (3 hours) to get a handle on depression/anxiety. I understand what you mean about the physical loneliness. It is very hard not having someone physically with you that you have previously been with every single day!
I know you weren’t seeking advice but FaceTime has helped us a lot. We FaceTime every night before bed or whenever I am having a crying episode. It is extremely difficult to be separated from the person you love, I understand.
I just keep telling myself this is temporary and sometimes in life you have to “adjust your sails” when things aren’t going the way you want them to.
If you need to talk feel free to PM me.