I’m so sorry. I sort of know what this is like. 5 years ago, my best friend had a stroke and went into a coma for months. We did not know if he would live, or wake up, or be able to communicate if he woke up, or be coherent at all. He did wake up eventually, and regained the ability to talk, and walk (which some doctors said would never happen). He definitely has severe consequences from it, but he’s mostly the same person he was before.
But for that long period of time, he was gone, and so many times I saw something I wanted to send him, or ask him, and he just wasn’t there. It was weird. He wasn’t dead, but he was dead to the world.
Losing a friend is like having a phantom limb. They aren’t there, but you can feel them and you forget they aren’t there, and you get reminded over and over.
I know the burnout too. I’m going through it right now, to a very lesser degree, but I’ve had it to an extreme degree before. A couple of times in jobs I had people leave, and I had to take up the slack, and worked my ass off to make up for it, and did well enough that the powers-that-be decided everything was great; they could get away with paying just one person and save money! Each time, when I realized that was the case, I got the fuck out of there. But that’s not always an option, or at least usually not an easy one, and sometimes burnout is temporary (as I’m sure it is for me, as we are going through a tough transition at work because of budget issues and “reorganization” causing chaos) so it will get better. And sometimes you can’t tell which is which.
I don’t have a solution for you, I don’t know that one exists, and I doubt you’re looking for one, but just know people are reading, and do care, and are sorry.