Swept Away - Michelle Dalton

Beachfront love blossoms in this refreshing summer romance, in the tradition of Sixteenth Summer and Seventeenth Summer.
Mandy Sullivan isn't exactly looking forward to the summer months as tourists invade her seaside hometown on the coast of Maine. Her best friend, Cynthia, has abandoned her for camp and her older brother just announced he'll be staying at college taking classes for the summer, leaving Mandy with nothing to do and no one to hang out with. Hoping to keep herself busy, Mandy takes a volunteer job at the Rocky Pointe Lighthouse. On her very first day, Oliver Farmingham asks for a private tour. A new--and incredibly cute--face in Rocky Pointe, Oliver seems more interested in Mandy than the lighthouse and its history.
Without her best friend at her side, Mandy is scrambling to act the right way and say the right things when Oliver is around. Cynthia--not Mandy--has always been the confident, flirtatious girl that everyone wanted to be around. As Mandy and Oliver spend more time together exploring the coast, biking through the woods, and attending the local summer festivals, their budding friendship becomes much more. But with Mandy's insecurities creeping to the surface, can she open her heart to someone who will only be in town for three months?