I just can't stand chapters where it's just the two of them at this point, at least other mangas stop with the "love rival chapters" after they get turned down, but instead they made her a delusional simp who has shown time and time again that she can't move on. If they had actually made accept the fact that he's in love with somebody else and progressed their relationship in a friendly way this would have just been a funny chapter with a little bit of teasing at the end, but like this I can't really see it as anything but her not being able to let go.
She was never a good rival to begin with, at no point of this story I felt like their relationship could develop into anything romantic, so keeping this up just makes no sense to me.