"And now, this is it. This is the ghost of what could have been. And there's no turning back. We know the truth. It was hidden behind words left unsaid." Harry and Hermione both come to a realization. (I'll go with you scene) HHr ficlet

Voldemort found Harry's greatest weakness : his love for Hermione.

Harry thought that the only solution left to avoid having nightmares was to avoid sleep as well, but he's mistaken and Hermione proves him wrong. Takes place during the hunt of the horcruxes in Deathly Hallows.

Hermione knows that he is the last horcrux. She knows that he has to die. Yet, she can't let him go so easily.