[She] was made up of skin and bones and hate and crazy, and hate and crazy don't weigh anything.
One time you told me that the opposite of love isn't hate. And I didn't understand that, but I think I do know. Because if you hate someone, you most still care, right? You have to care a little bit; otherwise you would just ignore them and forget they even live. Or lived.
It just means that if someone hates you, they still have feelings for you. If they really didn't care about you, they'd just forget about you. They wouldn't even waste the time hating you.