[Nascimento]

I don't understand the big displays for prom date proposals.

The flowers, the public attention, the chocolates..

Just get her one on one, and ask her to prom, with a tone of voice that states it would be cool if a yes but no big deal if its a no. If she likes you she will say yes. If not she will try to politely say no where you can just say its cool if it's a no.

She will be much more comfortable, you aren't pedestalizing her and making a big deal about it, and she will respect you more..