When you don't really want to live. When you feel bad 90.% of the time. What holds you back? For me it's my beautiful children. I had them , I have a responsibility to bring them up.
BUT, what if they turn out unhappy like me?
I've always a little bit sympathised with murder suicides in families. An unpopular opinion I'm sure, but I would not want to leave my children in this world with out help and their father is useless. So I'd never kill myself as I'd never leave them or harm them.