(That side note was about the comment or the chapter?)
Well, that could be the case, but in the novel, the "guy that is also preping for the event" asked her "you aren't gonna tell him the truth?", which means, that he could knew about her feelings for him before the confession part. It's possible that she was dared to/lost the dare on purpose to be forced to confess, but imo it's just as likely that she just tried to confess normally and before she went to confess, she could have said that she loves him and that she was gonna confess and the "friends" might have been like "there's no way he's gonna say yes, he's a robot" (or something)
TL

R
Everything's possible. We just need to wait 'n see.