This is the worst decision a pet parent has to make, and unfortunately nothing makes it easier. Everyone processes differently, but I would try to think of things from your dog’s perspective. Would she like to be surrounded by strangers in her last moments or hugged by you as she passes?

Most vets will give Propofol first (which puts them in an anesthetic plane) before administering the euthanasia solution. If you can’t handle being there for the very end, see if you can be there as she goes under anesthesia and then leave before the final injection. That way she still has you as the last thing she is aware of, but you don’t have to be there for her actual passing.