Across the Hall by Dawn Love

He fell in love when he was eight years old. His summer vacation had led to a childhood crush that he'd never forgotten. Though he didn't realize it, he'd looked for her in every woman he'd dated. She'd fallen in love, too. The lonely little girl she'd been had found a new friend, making for her best vacation ever. She's all grown up now but still lonely, perhaps more so than ever. A walk on the beach will change both their worlds forever.