"your cat wants you with him when he goes."
I will definitely be there to comfort him.
The voice he last hears, the touch he last feels, will be mine.
Cripes this makes me sad.
My experience is that when kitty starts to barely move around, and hide - ours tend to go under a bed in the spare bedroom - it's time. Still meeting you at the door, to me at least, is a good thing. The seizures *are* worse for you than kitty.
I always stay at the end. My vet hates doing it, but she's good and they just slip away. It's hell on me but I figure kitty deserves it.