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How to talk to a girl you like for the first time
Make eye contact.
Spend a few days catching her gaze every now and then. Don't just stare at her, though; instead, shoot her small glances until your eyes meet and she catches you.
When she does, smile slightly and look away after a second. You'll probably blush as well, which is all the better-blushing indicates you're nervous, which is a hint that you like her.