I say just play it straight. Don't use lines, if you're typical for here you probably suck at them anyway. Maybe just tell her you like her, think she's special, (whatever you think), and you'd like to take her out sometime. If she doesn't run, suggest a time/ event/ something.
"Normal" people like flowers, maybe bring her a single flower or something. Nothing fancy. Or maybe that would be too cheesy, I don't know.
Good luck.