If you are riding that much, a road bike is definitely in your future one way or another. Start saving your pennies and buying bits at a time when you are finding deals (as a recent college student who had a tiny budget and an addiction to motorcycle parts, I know this strategy well). You sound like a strong rider and if you really like speed, you need a road bike.
But as others have said, don't ride it to school or leave it outside. I'll leave my hybrid commuter locked up outside all day (graduate student now so still at university), but if I ride one of the nicer road bikes to work then they come inside with me.