Could you tell me the name of the movie

a black girl with a sensitivity to sunlight meets a guy who is her neighbour and he takes her out and they go to many places and at the end she realises that she isn’t sensitive to sunlight but her mother was overprotective because she lost her other child or children . The girl doesn’t die ( I am telling this information because you may think that I am referring to the movie names Midnight sun ) and I remember that her mother was a doctor and they has a beautiful luxurious house. Could anyone tell me the name of the movie please