Lyric discussion by obesechicken13 

Cover art for Human lyrics by Ellie Goulding

The lines "human behave yourself" and "you know not love or hate" as innfls pointed out don't seem to make much sense. As far as I can tell they only make sense when you think of the song as a conversation between a an emotional human having a breakdown and either, a robot, an unemotional human consoler, or their own self (slightly bipolar). Who they're talking to doesn't matter, but it is important that there is talk about wanting to be emotionless and wanting to have emotion.

A robot wants to be able to feel and a human wants to not make mistakes and cry. Anyways that's my convoluted interpretation.

@obesechicken13 "You know not love or hate" could mean the narrator hasn't let their guard down enough to let anyone in to experience intense feeling like love or hate.