Going into this as if it were an entirely new thing and the one-shots not happening, Miwa calling her one and only friend "kinda shitty" when we, the viewer, have no reason to think that was pretty dang rude on her part.
But anyway, I'm not prepared to go through this heartbreak again. Even if it's amicable and both parties stay friends, it always sucks when people break up. Just look at The Feelings We All Must Endure.