Writes of sad stories and fanfics know this.... if you are writing a character with depression and/or anxiety know that one thing that will catch your readers heart is not them hearing it and being shocked that everyone though what he was believing but that when the person agrees and everyone thinks nothing of it as that depressed character spirals further. accepting they are a waste, accepting they are hated and unloved, accepting they don't belong and accepting no one will ever tell them otherwise.