i have to be a flower girl at a wedding how should i dress i am 18 btw
Normally the bride picks a dress/outfit for you to wear. If you're lucky, it will be flattering and something you're able to wear again. 8)
a dress that's about knee length? maybe one strap and the bride can choose the color.
A crown of flowers is a must!
You should converse with the bride, but I would say something subtle yet traditional that somewhat blends nicely with the bridesmaid dresses.