The Best, and Worst, Summer Ever

Ashley thinks that she is in love... it's the summer before her sophomore year, she's on a vacation to Costa Rica. She sees Alex first on a plane then at her resort, is he following her? They get together and start hanging out and when she tells him that she thinks that she "loves" him, he runs away. Is there something that he's not telling her? Why is he so scared over love? All she knows is that she needs to figure it out before she goes back home and never sees him again...