How to flirt with a shy girl who likes you?

This sounds like a no brainer especially because until now I've had no problems with flirting with her before. Before she was just a joking friend who I liked but I thought I could get no where with because she is Asian and cares too much about school (not a stereotype, her mom is a tiger mom and strict about dating Asians.) But like a week ago I realized she likes me, in fact she probably has liked me for like a year now. Now I have no idea how to approach her and start a conversation. Is just afraid off looking stupid or dragging out awkward silences. An ideas how to flirt with a shy Asian girl who already likes me.