When I go back to school should I be this bold with a girl?

Alright so I'm going to be in my senior year of high school so I'm going to be as risky as possible because this is my last time spending time with these people. Back in my freshman year, I really liked this girl (let's call her Mary). I talked to her a lot on facebook and then I asked her on facebook (stupid I know) to go to this freshman dinner dance that was kind of like prom for freshman. It was awkward and we had an awkward slow dance. I kept talking to her on facebook which was a total mistake because I'm pretty sure if I actually talked to her she would've gone out with me. But I don't have any regrets cuz I was younger and naive and all that. The next year for some reason I think whilst talking to her online fir some reason I called her a *****. Yeah another stupid move. For the rest of sopre and junior year I did nothing. So after watching Rushmore for a second time, I decided I need to be more like the main caharcter and basically do what you want when you want. I was thinking when school starts back up going up to her and saying: "hey Mary, I know a couple years ago some stuff happened, but hopefully I've matured and I was wondering whether you'd like to go out on a date sometime?" My new philosophy is carpe diem, you know sieze the day. Good idea? Could I say it better? Suggestions? Comments?