sorry to hear about that, brother. my advice would be to tell her how you honestly feel, and if it doesn't work out, then its time move on! like you said there's plenty of other girls out there that are interested in you, so go hang out and have a good time. you'll get over it if it wasn't meant to be, and who knows what might happen with some of the other girls! and if all else fails, use it as an excuse for the rest of the chapter to take you out and cheer you up.
same thing happened to me a few weeks ago...so i know how bad it sucks! but i ended up transferring to a different state so things really didn't look like they would have worked out anyway.
hope things aren't too cold up in purdue bro! good luck. fraternally, brian.