Jessica and the Jarhead by Tilly Lebeck

Jessica met the love of her life when she was 17. Then she made the biggest mistake of her life. She broke up with him. Now, 10 years later, Charles is suddenly back in her life. Her grandma, the sneaky matchmaker that she is, left Charles and her a cabin.
Together.
Joint ownership.
With her ex.
It was a nightmare.
She was sure he wanted nothing to do with her ever again. So when he suggested they put the place on the market and be done with it, she packed her bags for a weekend at the cabin to get it ready for sale.

Charles was sure his heart would never be whole after Jessica so cruelly ended their relationship just days before he was to graduate high school. Now, he’s just determined. Determined to get back the only woman he has ever loved. When he learns about the inheritance, he sees it as an opportunity to win back the woman he loves.

Fate intervenes, and a blizzard closes all roads, trapping the two in the cabin together. Can Jessica finally admit her fear? Can Charles prove he is the man for her? Will they even survive long enough to find out? Is there such thing as second chances?