dude ... unfortunately in high school it sometimes does become a popularity contest ...
if during the time when u were with her did u ever get the feeling that she liked u ?
and dude ... never say never ....
have patience(easier said than done) ..... and start working on/trying on how not to be that nervous ... i am sure u r a great guy .. so have confidence in urself ...
do what u think is right ....
and hope for the best but remember .. dont get urself hung u on one person ... there are many great girls out there who i am sure(and hope) appreciate character more than popularity
best of luck
Hussain