During times of my mental health being up and down, I think about why, exactly, ending oneself is considered psychologically unhealthy. And I wonder this when I’m feeling really good AND really bad… because why should people be forced to do anything with their body, even live, for others? 
Most of the arguments are to think about the people that would miss you and what it would do to them, but that seems so much like emotional manipulation to me… why should anyone exist for the benefit of others? That in itself is depressing… I’m not going to be a martyr for the people around me that happen to like me. 
There’s also the one that typically I use for myself and others which is “it does get better, but you have to be here to make it better”. 
I still don’t think it’s fair, honestly, and I don’t understand.