Mr. December by Amanda McIntyre

Newly appointed Sheriff J.C. Nash has more on his plate than investigating a mysterious fire that’s destroyed End of the Line’s beloved library. Olivia Evans, the girl he helped save from criminal mischief charges back in high school even as she crushed his heart is all grown up and back in town. Worse than the sparks that still fly between them is J.C.’s fear that they will ignite a passion he won’t be able to walk away from–like she did to him, all those years ago.
Olivia once believed if she kept moving fast enough, her family’s dark secrets wouldn’t catch up to her. But when she comes back home to End of the Line to care for her ailing mother, she’s forced to face her painful past and face the man—now sheriff—she ran from all those years ago. Unexpectedly, the town and its people begin to creep back into Olivia’s heart, giving her the sense of belonging she’s longed for. But when things start to heat up between her and the sexy sheriff, how can she convince him to trust that she won’t leave again?