how to make a girl fall inlove for you?

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in my case, the girl that i want is so conservative. She doesnt replied on my text messages. We just meet once a week. at the time we see each other, its just like a typical friend saying "hi, hello". i gave her bouguet of flowers 3 months ago but still no effect.. she doesnt reply me.. she is a nurse and i am a nurse to.. we work on the same hospital.. she was assigned in emergency room and i am assigned in medical ward.. please advice me on how to make her fall in love with me.