to make a number of things very clear, from the get go : she wasn’t following him. yes, she had caught herself glancing across to his corner of the wyvern more than ONCE over the course of the evening ( which was very big of her to admit, she felt, when she could have said she was just admiring the scope of the event ) but no, she didn’t care about whatever was going on between him & pansy parkinson. who even cared that she was meant to be engaged ? not her. in fact, ginny would go so far as to say that she didn’t care at all that their few ( now much regrettable ) lapses in judgement had seemingly been forgotten weeks ago, and that she was far better off without having to waste her precious time wondering what EXACTLY had been going on between them, back when something sort of had been. it was obvious, now, that it was nothing. that was fine, and she was really happy to just ignore that he was even present, until ( through no fault of her own ), they actually came face to face.
she didn’t love it, but the truth was that while she really hadn’t been following him, there really wasn’t all that much truth to everything else. and - call it dutch courage running in her veins or, plain & simple, a really bad decision - when the door to the toilet she’d only idly been waiting on opened up to reveal him, ginny didn’t think half as deeply on the choice to jostle him back inside again just as quicly as she absolutely should have. it only takes a matter of seconds to make it in & lock the door again, behind them, but it’s clear how illthought out the whole thing is from the deep breath she takes and impressive buildup she gives only to manage, “hi.”