I need to know 😬?

i want to know how i could tell if a shy, quiet guy likes me. i’ve gotten really close to a coworker and he’s so shy and quiet and does certain things that make me think he likes me/has feelings but i’m not sure.. so i would like to know from the guys, especially the shy, quiet guys, what do you typically do, how do you act around a girl that you like?
I need to know 😬?
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