I personally struggled with it in my teens. I was about to go through with it, had it all planned out; how to do it without making a mess, how I wanted my body found, and so on.
But then I realized, I really just want to see what happens next. And that has kept me alive for more than two decades since.
I cannot speak for those I've lost, or what they were thinking. It still hurts knowing I was a part of their experience. As I said, RIP lost souls.