How to get a girl to notice me?

Hi im michael, im 16 years old and im a rugby player for my school, i am 5.7 and set the scales at 13 stone. I love athletics and anything to do with sport, and so does the girl im into. She is south african and has moved here and we never talk when she comes over with her mother. She loves athletics to and i want to change that into a chat. I know i am young to be asking for advice in a situation like this but i really like her. She is about 5.6, looks about 9 half stone, she is homeschool and i need tips to get her to notice me.