he's not saying that he hates her. he's saying that he hates everything about her but he's so confused about why he still loves her... it's self explanitory. please listen to the lyrics and if you don't know them...well DUH they are right up there...
its about being in love.. theres a fine line between love and hate. even if you hate that person its hard not to love them... love over powers hate always.
wow now i know what this song means cause its the way i feel about someone right now like i hate everything about them at times cause i feel like there just tryn to mess with my head but ill never be able to stop loveing them