Not as simple a question as it seems at first glance. You usually say "I'm fine", no matter how you really feel – this is only for the closest
people. Because explaining why you feel
bad isn't very pleasant thing and few
people won't take it seriously.
Usually when
people ask how I'm doing(how are you?) , the real answer is I'm doing shitty, but I can't say I'm doing shitty, because I don't
even have a good reason to be doing shitty. So if I say, "I'm doing shitty," then they say, "Why? What's wrong?" And I have to be
like, "I don't know, all of it?" – Bojack Horseman