Just to stress this important point: DO NOT DEMAND ANYTHING!!
Ask her out. If she says yes, awesome. If she says no, go on with life. If she doesn't give a yes or no give her your number and let her figure it out on her own time. Don't fret over it, though. If there's no immediate answer there's nothing wrong with looking elsewhere in the meantime. You're in college, you'll never have an easier time getting opportunities for relationships and other more salacious pursuits.
Ask her out. If she says yes, awesome. If she says no, go on with life. If she doesn't give a yes or no give her your number and let her figure it out on her own time. Don't fret over it, though. If there's no immediate answer there's nothing wrong with looking elsewhere in the meantime. You're in college, you'll never have an easier time getting opportunities for relationships and other more salacious pursuits.