Prolouge:
They met in the public library. It's a very unlikley place to find love, but love can't be sought out purposely.
They dated for months and months, finding they had so many things in common, like books, shows. and habits. They became eachother's best friend; anything could be said between the couple without judgment, even when he showed weakness - cheating on her with a younger girl - they got over it. They had a rock solid bond.
Untill he broke up with her.
Not for another girl, not b/c she was clingy, or whiney, or anything of the sort. He broke up wih her for no reason at all.
She planned revenge.