It's Jaelena

Jaelena Summers committed suicide at the age of fourteen, but five years later, her death still haunted her best friend, Paige Houston. When Paige was expelled from college and was forced to crawl back to her parents, she was startled and perplexed by the behavior of an alleged long-lost cousin, Madison.
And eventually, Paige wondered whether Jaelena was ever truly gone in the first place.