I'm in love with my best friend (Destiel highschool AU)

Dean and Cas have known each other their whole lives. They're best friends,but it's their first year of highschool and they both know that everything is about to change but what happens when Cas begins to develop feelings for Dean?

This will be mostly Destiel will some slight Sabriel in the background

Disclaimer-I don't own any of the characters just the story line and the art used in the cover isn't mine either