The premise carries more than a whiff of the collected works of Nicholas Sparks; his novels (such as “The Notebook” and “Dear John”) have ushered in a whole film subgenre of separated lovers who must grow and hurt and learn to love again, because the hand of destiny or something is in play.
Even if you're not a fan of Sparks movies ("The Notebook," "Dear John," "Safe Haven" plus others), "Forever My Girl" offers several appealing elements.