She cheated
No one knew the reason Ron Weasley and Lavender Brown really broke up. Many thought it wouldn't work out anyway. The official story was that they both thought they were just too different. A very believable one, it was what everyone thought anyway. The real story was that she had cheated on him, with several boys from Drumstrang she had met on holiday over the summer. She had no remorse for what she had done. In fact Ron was pretty sure she was glad she'd cheated on him.
Ron hadn't told anyone. Not even Harry. He was too embarrassed. What was wrong with him? He couldn't even keep his girlfriend interested. There must be something wrong. Maybe it was his looks. He'd always thought he had far too many freckles and his nose was... maybe, a bit crooked from playing quidditch, but he hadn't thought he looked that bad. Maybe it was the hair, he'd always hated his shock of orange hair.
Perhaps he was boring. Hermione always complained that he talked about quidditch and nothing else. Or it could be his physique. He wasn't fat but he wasn't particularly muscular. If it was any of that why had she dated him in the first place ? Maybe she had dated him out of pity.
Ron sighed and swiped furiously at his eyes.
"Damn allergies" He muttered, knowing full well it wasn't any sort of allergy. He had an idea. Handily it was a Saturday which meant he could put his plan into action. He grabbed his clock and dashed off to Hogsmeade. He came back hours later and no one recognised him. His hair had been dyed a dark brown and his hair was spiked up. His new darker hair contrasted with his pale and somehow freckle free skin.
His plan hadn't worked out quite they way he'd thought it would. He thought he'd feel so much better if he looked like a different person. That maybe if he looked like a different person, he could be a different person. No, his looks wasn't his problem. He was the problem but how do you fix yourself when you don't know where to start.