Tum Jiyo Hazaron Saal (2002)

Sunanda Kohli is the only daughter of Dr. Mukta Kohli and her husband. Dr. Mukta runs a small clinic and a hospital, whereas her husband is retired. Sunanda meets Sandeep and both fall deeply in love with each other. Sunanda introduces Sandeep to her parents, and both approve of him. Sunanda is also introduced to his parents, and there too is approval. When the time comes for an engagement ceremony, Sandeep finds out that Sunanda does not like him anymore, leave alone marry him. He is heartbroken, and sets out to find out about this sudden change in Sunanda's affection for him.