Sasuke Uchiha really hated a lot of people. His brother, the Dobe, and Hyuuga Neji, to name a few.
But above all, he really hated Sakura Haruno. No, he loathed her.
It wasn't because of the annoying, pink hair, he actually started to like absently playing with it when they sat next to each other. Not because she didn't throw herself at his feet anymore.
No, it was because he fell for her. Hard.
And the thing he hated the most about her was that he didn't even realize it. He thought that it was normal that he played with her hair, occasionally braiding it, joking with her, opening up to her, and even comforting her when she cried.
But maybe it was just one of those things that were always there so he never felt any different when he experienced it.
It was one of those moments where you're blissfully unaware.
Until you see her with another guy, and he's doing the things that you normally do to her, and then you would think that you'd be unaffected, but the bloodlust coursing through your body is hard to ignore.
Then the bloodlust is gone, because you're starting to feel sorry for the guy, because, like you, this guy might have fallen for her and will realize it one day and it will hit him like a chakra-enhanced slap to the face by the aforementioned kunoichi.
And when you think about it for a moment, maybe this guy has already realized it when he watched Sasuke and Sakura together. Maybe that's why he's wrapping his arm around her shoulders in a seemingly friendly way.
And then the bloodlust is back.