She'd tried to talk herself into that for a while - a long while, in fact. She'd fancied Ron. She still had, up until he began dating Lavender. But before that, their flirtation had been so innocent. Somehow, seeing him with Lavender had done several things at once: she realised this was no longer the time for chaste fancying of old friends. She realised that she didn't really want to be Lavender, in the situation. Whenever she saw Ron and Lavender together, tangled in chairs and swapping spit, it didn't seem... appetising. Maybe she didn't fancy Ron anymore, after all, or maybe she just didn't think what they were doing looked like much fun.