Any Chance?

<p>Hey, I visited Columbia last year and fell in love with it, but I'm not sure if it's the right fit. And at the moment I'm having huge doubts that I have any chance at all of getting accepted. For one thing I go to a small Arts school, studying stage production. I don't know if that's a good thing or a bad thing, but my passion is film (screenwriting, directing, editing, cinematography, etc.)
I have had straight As in all of my classes since freshman year, and this coming year (my senior year) I am taking the most rigorous course-load my school offers.(which isn't too impressive considering half of all our classes are dedicated to the arts) The only class my school actually offers in "AP" is English, which I took in my junior year and will take again in my senior year. I'm think the "Advanced" Calculus, Spanish 4, and World History classes I'm taking this year might also count as AP, but I'm not 100% sure. (My school is so confusing) I have a 2160 on my SATs (CR: 650 M: 710 W: 800), and I'm taking them again this fall. I'm studying a lot and hoping to significantly bring up both math and critical reading. I'm also taking the Spanish, Math 2, and Literature subject tests this fall.
But what worries me most is my ECs. I have tons of experience doing stage production work inside and outside of school, and I've also participated in some film competitions. But besides that, I'm a leading editor of the literary magazine at our school, a member of the NHS, and I started tutoring Math and Spanish in my Junior year. Yeah not much...I'm worried.
So basically what I'm wondering is how much the whole Arts school thing will affect my chances, positively or negatively. And if it seems like I have absolutely zero chance of getting into Columbia (my dream), what are some other good liberal arts schools that I might have a shot at?
Thanks for any help!</p>