While You Were Sleeping (1995) on Netflix

Lucy is a happy-go-lucky ticket seller, until one day she finds the man of her dreams and also sees him get mugged. After being mugged the man, known as Peter, goes into a coma. Lucy goes to visit him at the hospital and the nurse tells Peter's family that Lucy is his fiancée'. Lucy can not get the courage to tell them the truth and his family take her in as a member of their family. While with this family Lucy falls head over heels in love with Peter's brother, Jack. Lucy does not know what to do when Peter comes out of a coma and doesn't remember her.