Help find this book about a girl who moves to Tennessee after her friend dies.

In high school I read this book about a girl who moved from Arkansas back to Tennessee after her best friend committed suicide because her sister drowned after the main girl and her friend were high. Once she moves back to Tennessee, she reconnects with these 2 guys who she was best friends with when they were all kids and also one of the boys is her neighbor and her grandma cleans their house because the boy's family is the wealthy family in town. also it gets revealed that the rich boy is the son of his mother and "dad's" father.