OOoooooo, I agree with Pandora! Vintage! Vintage! Vintage! Go look in your grandma’s closet or your old doddy aunt’s closet. Check out secondhand shops…for some lovely retro prom dress that you can alter. The 30’s and 40’s had some glamorous dresses. Don’t be like every other girl there…be different. You can also find vintage formal patterns on Ebay…for a few dollars and you can have someone sew up something for you.
What inspiration? Watch the movie “Pretty in Pink” with Molly Ringwald. That dress looks naff now, but in the 80’s it was cool. I would also watch any old movies (Bringing up Baby and The Philadelphia Story) for some glam stuff.
I hope he asks you for Halloween…if he doesn’t….throw your net wider…
All the very, very best to you….keeping my fingers crossed for you!