How do I ask her out?! PLEASE HELP!?

[BROBLOX]

I really, really like this girl at my school, we are both in the 8th grade. She is new this year, and I liked her ever since the 1st week of school. We usually talk about every school day, and sometimes on Facebook. I get nervous when I talk to her, but I manage to do it. Every once in a while I catch her looking at me, and right away she looks te other way. A few people said that we would be a cute couple, she just said eww, and glanced at me with a slight smile. She is now one of the managers on my basketball team, which I wasn't sure if it was her "plan" to get closer to me. For the last dance, neither of us went, but she asked me if I was going. My mon doesn't want me dating until I am 16, and my dad will probably go along with her to make her happy. I really like her and I want to date her, but I don't know how to ask her out, and how to keep it from my parents. Sorry this is sorta long, but I am trying to explain the situation so you have a better understanding. Thanks!