Bruh, If yandere says anything to you, even if you are not the most fortunate man(her loved one) you too need to act unquestioningly on her orders.
It's common sense.
Tbh i wouldn't want this to end in a sad way, and it would be worse if the girl decided to go to his bestfriend(which is doubtful because she is a yandere/or yangire? So that lessens most of my worries towards the end)