Hmm. At my prom (2012 so not that long ago) more girls opted for the shorter dresses, so you're not alone with wanting to wear a dress like that! Prom is all about having fun & dancing and partying with your HS friends. Why would you do that in a stuffy big dress that'll probably cost a fortune??? All that being said, maybe you should go bigger on the hair (obviously the pic you posted is not the final look, like hair & makeup and all) BUT omg if you got yourself a professional blowout and some tall, hot shoes - you'll def steal the show!!