I'm having the hardest time trying to explain to my loved ones that A) I don't know why I'm sad all the time, B) I don't know why I think everything is my fault, C) I would fix myself if I could.

Please help, if you can, because I'm having the hardest time with this, especially since I don't know any answers that they are asking for.
I don't know, I'm just at my wits end.