When do you know your crush hates you?

Answer 1

When you have a feeling of dread or opposition towards one. If you feel that they're always doing something wrong, or being so annoying or against your thoughts of what one would be, that is when you know that you hate someone. Also when you think that they're bad and annoying but you won't admit that you truly and completely hate them, those could be some signs of you hating someone.

Answer 2

If he stares at you when you are not looking, then you catch his eye, he doesn't look away, he just stares at you and doesn't smile. You might think he likes you, but the thing there is that he KNOWS you like him. And well.... he's friends probably told him that you like him, and every time you pass next to him, he gives you a dirty look because he's friends make jokes of you and him and stuff! DON'T CRUSH A DIRTY LOOKER!