In Need of Honest, if-I-was-in-ur-shoes ADVICE

Okay, Prom is around the corner, right? Right. Now, I have been talking to this boy for over two years. We've never gone out officially but we basically were together. I mean, whenever we would get together with other people, we to this day rub it in each other's face. I'm thinking about taking him to Prom, cuz you know, it's the perfect story right? We never went to Homecoming or nothing together cuz he and my friends never got along. But, now they're okay and it's the last dance ever. One, he's a junior. Two, he's cute, but he's short for his age of 17, and I'm tall for my age. There might be like a 4-5 inch difference between us, AND I want to wear stillettos (u kno!) So, being completely honest, I mean it is PROM and I've always pictured it being PICTURE PERFECT. So I'm trying to deal with this height thing, with taking pictures and just in general. So, honestly, especially from girls but guys who have been with girls that are taller, what would you do? I want to just be like "it's not about that"....but I feel like after 18 years of it "being about that", I gotta like convince myself...u kno?...HELPPPPPPPPP