The Ultimate Escape - The Lady P Chronicles, #1

On the eve of her wedding, Julia realizes she cannot marry her fiancé after all, no matter that it's been her dream for eight long years. Too distraught to face him, she follows in her mother's footsteps and flees to the future for a brief reprieve. Oliver knows he has bungled things badly, but he is determined to win back the woman he loves, even if he has to travel through time to do it.