The Vow(2012)

Happy young married couple Paige and Leo are, well, happy. Then a car accident puts Paige into a life-threatening coma. Upon awakening she has lost the previous five years of memories, including those of her beloved Leo, her wedding, a confusing relationship with her parents, or the ending of her relationship with her ex-fiance. Despite these complications, Leo endeavors to win her heart again and rebuild their marriage.