Hanabi has never loved the MC - she loved the idea of having a boyfriend. Which is pretty common for teen relationships. It is also why teen relationships rarely last long - the teens realize that they don't actually like spending time with their boyfriend / girlfriend. But these two bozos stuck it out for 10 years.
i think you shouldn't waste your time and goes straight to the hospital (or any temporary treatment), this is an actual emergency situation, even if she's a nasty bitch you shouldn't left an injured person, like JUST GO ASAP!! Damn bruh 💀