To be fair, she didn't know what happened to him in the alley, so she probably thinks that he hurt himself pushing himself too far in baseball, rather than the assault.
Both of them are be very selfish here. The girl wants him all to himself, while the guy wants the things that are best for him, however he doesn’t actually confront his friend about it.
I'm totally cool with her dying or whatever but I'm totally worried for Ochi. This psycho will get him killed. Ugh if only this was a happier manga, then he and the idiot love interest can resolve their issues and become better friends. But course that ain't fucking happening.
The friend ain't that much better. From what I can tell, he's a coward of sorts. Why did he confront the girl instead of the guy? Or at least confront the girl along with the guy.
He doesn't want to hear, but she's not wrong. If he's injured and not getting treatment then he only has himself to blame. He must not be as interested in baseball as his friend claims he is.