I deleted my Facebook account in 2012. Haven't missed it. Let's hope this poor soul can finally be brave enough to find the close account button. Might not even need to write a script to do that.
I think you need to deal with this before you get to the edge point. You need a way to understand your own emotions and why you are feeling like that, and start to resolve underlying things like stress, strained relationships, existential angst like what is the point of work etc. I find praying to Jesus the Messiah helps me a lot.