Kinda hard to feel bad for the girl when she expects romance from a guy she isn't dating.
She made it clear that he would be his medicine and nothing more, now that she's caught feelings for him she's getting frustrated that he's treating her like a friend and not a romance partner.
You reap what you sow.
Now that random mangaka assistant ruining the mood, that one I do genuinely feel bad about. Just when things were about to get good. XD