She definitely could've worded that better lol, it's valid for her to not want to associate with her anymore as friends after confessing but making it seem like an ultimatum made this bad for the both of them
Well, a confession between two best friends/childhood friends kind of inherently is an ultimatum—it’s trying to get what you want at the risk of losing what you have, which is why so many useless MCs agonize about it so much.
In this case, it’s a borderline-yandere character who makes that dilemma explicit. And I agree with ColdGoldLazarus—this (especially the choking part) read at first like it was going for black comedy but then didn’t commit to that bit, so it ends up feeling awkward and ambiguously sinister.