Ive been havin a girl probleme......?

im fairly young and everyone is startin to get into datin... girl i liked and i asked her to a dance, i broke up with her friend who she is fightin with a week before i asked her. she said she would think about it and the day of she said no because my friend asked her and she said yes to him. my friend didnt know i liked her but i knew he liked her the day after i asked her. i really like her even though i dont want to and i have to idea what to do.