Alright, the girl has no right to complain when she spent the entire manga telling the MC to buzz off and that his role is that of medicine only. This isn't the protagonist's place to apologize, it is her who needs to realize she caught feelings for him and just placed the responsibility of her emotions on someone else.
Let's see how the father will deal with this situation. I'm hoping (but not expecting) he'll give her some advice on how to deal with boys - if you tell boys to do X expecting them to do Y, boys will do X and you will get disappointed for your own stupidity; if you want boys to do Y, tell them you want them to do Y.