Never Fading Dean x Reader Insert

Introduction

Twenty Years Ago-
"Dean! Sam! Wait up!" You call as you toss your (any color) messenger bag around your waist and jog up to meet the two Winchester brothers.
You catch up and they both giggle at the fact you had to jog to get up to them. You however, where not amused. There's one thing you hated and that was being underestimated. Yet you smiled since you were in a good mood.
"To be honest (your name), you are really a ball of fun." Dean smirks cockily. Sam nods in agreement.
"Well boys, I'm still the one who can kick both your asses." You return the cockiness. This made both of them laugh.
"Hey Dean and (your name), I'll catch up to you. I've got some questions on an upcoming English test." Sam announces.
"Alright buddy." You and Dean both say at the same time. Once Sam left you both started joking around. Since these two jokesters came this school you three were inseparable.
Nothing could come between you two.

One Day Later-
"Let's agree on something." Dean suggests. He seems a bit serious today. This wasn't like him.
You were reading a book to find the formula for a test in Science. You kept your eyes on the printed paper.
"Depends." You eventually respond. He closes the book. This really isn't like him.
"(Your name). I love you but, my Dad, Sammy, and I need to leave town. Promise me you'll look for us when we're older?" He asks.
You stare into those grassy green eyes.
"I promise. I'll look for you and Sammy." You smiled.
"Then, let's get out of here and catch a movie?" He coughs. He really hated silences. Also libraries.
"Okay then, let's go." You agree.