I've read OoTP and I still dont hate her. You have to understand what she's going through. I mean, hello!, her boyfriend suddenly died and she has no idea how it happened. Also, that fact that she was very confused during the 5th book. She obviously had feelings for Harry, but at the same time, she felt guilty because she might have felt that she was betraying Cedric, who is dead. And to add on to that guilt and confusion, Harry was the only one who saw Cedric die. Just imagine it, you start to fancy the guy who was basically the last one to interact with your dead boyfriend. Of course you would have all the emotions. And you've got to admit, Harry acted a bit tactless at times. He really needs more experience when it comes to girls. And yea, Cho did some things wrong too. They both need some growing up to do. I'm not saying that they should get back together, but they need to settle their unfinished business.