Hermione wasn't the only one who had the urge to curse or punch Ron. The emotion was strong in him as well but he was going to hold off on it until Ginny wasn't there. It wouldn't do to hit her brother until he knew how much or how little she knew about the situation at hand.

When Ginny reacted with that expression and Ron told her not to drink the potion, he knew. She hadn't known and was just as much of a victim as they had been. He sat back in his chair and watched as Ginny drank it down. "It shouldn't take long," he assured her before sending a narrowed look to Ron.

"Tell me this, Ron, do you even care that you manipulated us for as long as we've known you? Did you care one ounce about Hermione or was it simply about having her like you were the best friend to the Boy-Who-Fucking-Lived?" He didn't really think the boy had any feelings toward them whatsoever other than possessiveness.