Chapter 4 - Ron
He first knew after the final quidditch match. Being the Ron that he was.
He knew how happy she was feeling, having just won the cup for her house.
He knew how upset he was feeling, having been forbidden to play with his team.
He watched as she celebrated with her team, eating, drinking and letting herself go. But he also watched her throw regular glances towards the portrait hole. And being the Ron that he was, he couldn't figure out for the life of him why.
Then he watched as all heads around him, span to face the entrance to the common room, and listened as all noise subsided for a second, before Harry Potter, gryffindor quidditch captain 1996/97, came clambering through the portrait hole.
And he watched as all around him people began in a flurry to move.
He watched as they cheered and clapped for him.
He watched as Seamus shoved the cup in his face.
And he watched as she flew past him, towards him with her arms open wide and a hard, blazing look on her face.
Then he watched her kiss him.
He watched her mouth meet his, her arms fly around his neck and his arms gather around her waist, pulling her up to him.
At first (being the Ron he was) he didn't get it.
But then he did. He knew that his best friend, one and only Harry Potter, was in love with his little sister, Ginny Weasley, and that his little sister, Ginny Weaslay, was in love with his best friend, the one and only Harry Potter. And he knew, through that kiss, that their love was strong; nothing was to keep them apart; they would be together forever.
And he knew something else: she hadn't won the quidditch match for her team, or her friends, or even her house, she had won it for her Harry.