Regret.
One of the strangest emotions.
Finally, you think that you have everything figured out. You believe that you found happiness.
Then, something happens.
A change of heart.
Or perhaps, you think for just a moment that, maybe, things aren't as great as they seemed.
And then, it consumes you.
What if you made a mistake? What if this whole thing is a lie?
It's constantly on your mind.
Driving you insane.
She knew it was wrong. Everything about it. He was everything she was never supposed to have, and yet, he was everything she wanted. So, Hermione let herself fall hopelessly for him. All she could think about was him. His silver eyes, his platinum hair. He was perfect, but he'd never notice her. He'd never think of her in that way. So she accepted it. Accepted defeat.
At least, for now.