Okay i need some help...need to be answered fast....so theres this girl in my school?

We had cl together last year and at first we didnt really talk or anything but when we started to tlk we would flirt all the time. and ievne though i didnt see her that way at the time i flirted with her back. Towards the end of the year though i relalized that i was starting to like herand she was growing on me. So over the summer we only rtlked sparingly and late at night cuz of her volunteering and work and i had sports and so towards almost the beginning of the school year we started not to tlk as much and i thought something was wrong with her like she was mad at me or something. and then she started to ignore. It was a weird ignoring job though because some days she would ignore me and others she would smile at me and we would talk. But then i guess she got even more angry at me for what i dnt know what and one day i was walking in the hallway and she was walking with a friend and then someone behind me called me and i turned and as i turned she like rushed by me. and her friend called her name and was like wth then she turned back and saw me and in a surprised voice said "Oh you guys stillarent speaking" wth i dnt know what to do and now ive been scared to tlk to her even though i like her and i want to go out with her. and wheneveer i had asked her previously she would say nothing was wrong but i kknow that was a lie...WHAT SHOULD I DO>????!??! i mean i really like her and all. please help son becuase we havent spoken already for abut 2 weeks =((((