Charlie falls in love with Alex after becoming part of their friend group. The two are named prom kings and Charlie proves himself to be an incredibly good person, sticking by his friends, and supporting them however he can. He even helps convince Zach he needs to get inside the hospital to see Justin before he dies.
He sits with the Standalls at graduation to cheer on Alex and the rest of his friends and will no doubt remain the captain of the football team next school year.