I know a depressed person when I saw one, coz I've been there. Hannah was so deppressed, because of the effects of the rumours & the lists, how people around her speculate about her life without even knowing her well.
Hannah didn't get help nor talked about what really happenened, she blamed everyone else instead. BUT THAT'S EXACTLY WHAT DEPRESSED PERSON DID. They'd blamed everyone else for every little thing went wrong in their life.
For those who shows initial symtomps of depression, go get help, I'm sure now few hotlines for that, share what you're feeling. For those who see that symtomps, don't walk away, help her/him to talk about their problems, make them realize that life is worth living for.