The entire Yule Ball debacle, and this quote in particular, always spoke to me about the relationship so I guess I just expanded from there...

"Harry didn't say anything. He liked being back on speaking terms with Ron too much to speak his mind right now - but he somehow thought that Hermione had got the point much better than Ron had."

Harry sighed as he trudged up the stairs after his two best friends, both of whom had ascended in an angry huff moments before. All this Yule Ball drama had made battling the Hungarian Horntail seem like a leisurely activity. Finding a date had been incredibly stressful, the ball itself had been dull, and now his two best friends weren't speaking to one-another.

Harry knew deep down that Hermione was right about Ron. It was quite apparent that Ron harboured feelings for Hermione and that those feelings were reciprocated. Ron wasn't upset about Krum being Hermione's date because he was "the enemy" but because he was jealous. Harry knew that his two best friends had liked each other for years. He sometimes wondered why they didn't act on those feelings; in fact, he had begun to think that the Yule Ball might be the perfect opportunity for them to finally make progress.

Part of him had been hoping that they would. The constant bickering, huffy exits, and proverbial tug-of-war with him might end. Plus as his two best friends, he wanted nothing but the best for them so if this would make them happy then he wanted it.

However, he couldn't help giving a shake of his head as he entered his dormitory. If this was what a fight with them was like when they were friends, he didn't want to be within range of their wands if they were to have a lovers quarrel.