What is this book called, its about a girl who gets leukemia and meets a boy in the hospital... ?

i read this book a long time ago and i really liked it even tho it was really sad. they fall in love and the boy ends up dying in the end. does this sound familiar to anyone? i cant remember the title.
Update: no, its not a very popular book. and the whole thing is about them falling in love. it starts out with her on a date with another boy. then she starts to get really sick. gets diagnosed. and meets him in the leukemia center. the girl lives with her dad and grandma.
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