Taking Notes -Larry au-Coming Soon)

Harry Styles is a 16 year old boy that attends Wellington High School.
Louis Tomlinson is a 17 year old boy that attends Wellington High School.
Harry and Louis have been friends since the ages of 12 and 13.
But you know what else has been happening since the ages of 12 and 13?
The notes...
Every night someone sneaks to Louis' home and tapes a note and a picture to his bedroom window.
The notes are always the same, they always have two names, two quotes, two dates, a note at the bottom, and what number note it is.
Each picture was the same, it was always a picture of the people mentioned in the notes.
The bad part about this?
The quotes on the notes are rude things that the two people have said about Louis. The pictures are of when and where the two people said those rude things.

Louis keeps every note and photo in an album for four years, never trying to stop, find, or tell on the writer, just self loathing about the notes.

What happens when the writer gets bored of Louis' disinterest?
What happens when Louis tells Harry about the notes?
Who's taking note on Louis?