Don't Do This To Me

A contest entry for this contest by BoysAreHeartBreakers and this by L O V E A L W A Y S

These are the three sentences I was given:

01. They turned and hurried back down the steps.
02. I knew what I'd done as soon as the door closed.
03. The water looked deep and inviting

The sentence i chose was:

02. I knew what I'd done as soon as the door closed.

Caleb has always harbored feelings for his best friend, and has had a certain habit of writing stories about himself and his friend together romantically.

Jetton is Caleb's best friend, and he finds those notebooks.