Breakaway by Kat Spears

When Jason Marshall's younger sister passes away, he knows he can count on his three best friends and soccer teammates—Mario, Jordie, and Chick—to be there for him. With a grief-crippled mother and a father who's not in the picture, he needs them more than ever. But when Mario starts hanging out with a rough group of friends and Jordie finally lands the girl of his dreams, Jason is left to fend for himself while maintaining a strained relationship with troubled and quiet Chick. Then Jason meets Raine, a girl he thinks is out of his league but who sees him for everything he wants to be, and he finds himself pulled between building a healthy and stable relationship with a girl he might be falling in love with, grieving for his sister, and trying to hold onto the friendships he has always relied on. 

A witty and emotionally moving tale of friendship, first love, and loss, Breakaway is Kat Spears at her finest.