When the Heart Heals — Simone Beaudelaire

When fat old Mrs. Thompson forces Drew to work with his long-time enemy Alyssa on their senior English project, the future doctor is furious. But he quickly comes to realize that the girl he never liked is actually kind-hearted and beautiful... and shouldering the crushing burden of caring for her ailing father. Against the odds, these long-time rivals find their way to a high-school romance: intense, passionate, and destined to end... That is, until a run-in with a drunk driver leaves an adult Alyssa in need of Drew's professional help. Friendship flares into passion again, but Alyssa, convinced she isn't good enough for her doctor, flees in the night, taking with her a secret that just might bring them back together forever... or tear them apart for good.