Undertow by Kaia Knight

When Gabriel dives off a cliff to save Kailani, neither of them is prepared for what comes next.
In a bid to gain her independence, Kailani traded the sunny shores of Hawaii for the mist-laden forests of Oregon. Her varsity swimming scholarship is her lifeline, and her college degree will be her ticket to freedom. She is ambitious. She is driven. She has a plan. But she didn’t plan on Gabriel.
Gabriel McEwen had abandoned his plan of becoming a rescue diver, until meeting Kailani ignited something in him he thought long extinguished. Tension with his father and unhealed wounds from the past keep him locked in a war with himself.
But there are more than their troubles to keep them apart. Had they known falling in love could mean throwing away their futures, they would never have shared that first kiss. Will they resist the attraction that could destroy them both?