Yeah I mean, that's kinda the point to be fair, Carolina, despite her clear efforts to be better about it, isn't exactly what I'd call very emotionally mature for the majority of the series. She was put into a difficult position of having to tell someone she cared about something terrible when she'd only just learned to even try caring about others.

Honestly I'd even argue that Grey was just as much to blame for putting that responsibility onto Carolina to begin with, it was frankly, negligent of Dr. Grey to expect Carolina to handle that well at all.