Ron stared at Ginny, who was sobbing. Because of him. He didn't annoy Ginny, or piss her off - he made her really, deeply upset.
He closed his eyes, and when he spoke, his voice sounded foreign to him. "Ginny... I... I am a completely rubbish brother. I am so, so sorry. After everything you've been through..." He covered his face with his hand. He really didn't know what to do, and he'd give anything for this horrible, twisted guilty feeling to go away.