I don't really see wanting to die as having lost my mind, in my case it's having awareness of the fact that existing is burdensome, futile and harmful. But I do know that I would suffer even more if I was always awake for 24 hours, at least I can sleep for at least some of my time spent here and sleeping is the best way to pass the time as it's the closest thing to not-existing.
But still temporary sleep could never offer much of a relief as long as the chance of waking is always there and it isn't like it's always straightforward to fall asleep. Only non-existence could ever bring me the relief I have always wished for.