It is not impossible...it is just nearly impossible lol.
Besides, the way you write it seems you're pretty sad cause you cannot get this girl...awww...cute...man up FOR GOD'S SAKE!
This is just a damn girl you barely know, that is hot, that you 'like' her, so what? I meet a couple of girls I'd like to bang every week that I do not end up banging, so what? all your happiness depends on one damn woman? da fuc-k?
She is not into you, she is into going to dance either with you, with you and more people, or without you.
ACCEPT THE REALITY. Jeez...
P.S.
You should focus on learning about inner game and in other words, to feel happy with yourself, without any woman blurring your mind.
Learn to life happy this way (getting a job, some hobbies, good friends, interests...) and once you feel good in general, then you go to pick-up chicks. Because if you do it the other way around, you would feel sad like you do now when a girl is not into you (which is the norm for all men btw...).