my cLassmate dOesn't LikE mE.:(

..I am 15 years old student of Camarines Sur National high School.When I'm in first year highschool I had experience something that I really can't understand. I made this because in first year highschool i had a problem about a new classmate. I had a hard time coping with her. I feel that she doesn;t like me or my presence. It's like she is always irritated whenever I'm around. i dont know the reason behind it. I'm trying to mbe nice to her but i feel she really doesn't like me. What should i do??hai..well get lost..