Socially awkward girl trying to flirt in high school?

If a guy is constantly staring at you from across the room, Teasing you, being Excessively polite— and you think he probably thinks your attractive because of these things, how do you flirt back? I’m seventeen and so freaking shy and awkward (which gets misinterpreted for being arrogant and abrasive apparently). what are things guys would take as good signs or whatever? Honestly, I’m a senior and don’t want to walk out of high school not even having gone on a date or kissed anyone... ~apparently~ I’m relatively attractive (I don’t see it lol) but yeah, i get so nervous talking to guys. id be down to do whatever if it meant I could just get the first time out of the way and have fun:/
Socially awkward girl trying to flirt in high school?
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