Sanemi wasn't sure what was about you that made his blood boil. He always brushed it off, assuming you just simply had a very punchable face.

He didn't wanted to think about why you made him feel like that, the anger and hate were far more overwhelming for him to stop and think why were you originating such anger. He picked fights with you for the sake of watching you flush in anger.

He needed to know you felt the same he did, because he wasn't going to let you make his life miserable without making your life miserable as well.

Though maybe, if he actually stopped for once and thought why he felt the way he felt about you, maybe he'll notice it wasn't anger what he felt towards you...