It varies. She may, or may not, mean it. If she means it, it may still be temporary.
Usally it means the opposite
he hates you
For whatever reason of hers she does not like you.
That she really does love you
it mean he likes you more than a friend or he hates you
means he dont hate you
it means he hates you.
She fancies you but is to shy to say it
that means he loves or hates you still he might love you!
Depends on tone, but she probably doesn't hate you.
he doesn't want you to know he likes you!
If a guy says "no, not even close" when asked if he hates you, it typically means that he doesn't have any negative feelings towards you. It suggests that he either values your relationship or sees you in a positive light.