Ripple / Hubbard, Amanda

Lexi is cursed by the siren's song and, after having to kill the last boy she loved, has cut herself off from making friends or falling in love, until one boy manages to break down the walls she has built around her heart, but when Lexi is offered a chance to live a normal life if she only gives him up, she must decide if it is worth the cost.

"Lexi is cursed with a dark secret. Each day she goes to school like a normal teenager, and each night she must swim, or the pain will be unbearable. She is a siren--a deadly mermaid destined to lure men to their watery deaths. After a terrible tragedy, Lexi shut herself off from the world, vowing to protect the ones she loves. But she soon finds herself caught between a new boy at school who may have the power to melt her icy exterior, and a handsome water spirit who says he can break Lexi's curse if she gives up everything else. Lexi is faced with the hardest decision she's ever had to make: the life she's always longed for--or the love she can't live without?"--Publisher.