Last chance to ask her out. Please help me deal with my infatuation?

[Chris]

there's a girl i met this summer and have become friends with. she's a freshman and i'm a senior, we were both in a musical together this summer and made friends with other cast members. on occasion a group of us have gotten together to hang out. i keep noticing that each time i see her i like her more and more. I've liked her pretty much since right after the show ended, because then she wasn't always around. I wanted to ask her out a few weeks ago (the last time i saw her) but never took a chance. I just feel so stupid that i can't do it. every time she puts up a picture of herself on facebook i am just stunned at how beautiful she is. I'm not a stalker or anything, i know her personally i just love seeing her and how beautiful she is. I need help, i don't want to just be a lonely creep who stares at pictures of her, i want to have the courage to ask her out. now my intentions are completely pure, i'm not after sex or anything, just a healthy and happy relationship. i don't want people to take my feelings for her the wrong way, especially her which is why i'm so shy when we chat on facebook, because i don't want to go off about "Oh you're the most beautiful girl ever" or "You are so perfect in every way" because it's creepy. I have her number now, but she's not too big on texting or chatting on facebook. She prefers face to face conversation but i never get to see her. Tomorrow is probably my last chance. She's going to be at my rehearsal tomorrow and i plan on taking that moment to ask her to the movies. I just feel that a beautiful and sweet girl like her deserves to have someone who treats her like a princess. I just really like this girl and i want to be with her because she's so amazing and everything about her is perfect. Her smile, makes me feel butterflies. Wow that's corny. She really deserves a nice guy, and i like to think that i deserve a nice girl too. I even wrote a love song just because of how i feel. Any advice would be great, thanks