How do shy guys react to a girl complimenting them?( what if this guy never got a compliment and did so for the first time?)?

okay ik i shouldn't be saying this but like this guy isn't even good looking but i find him hella attractive. when i told my friends, they were like "why him" or "u have a bad taste", but he is a sweet guy. okay so he never got compliments from a girl. now how would he react to it when a girl he doesn't know calls him attractive? will they think about it? i mean he blushed and smiled and didn't make eye contact with me when i confessed. what do i do?

How do shy guys react to a girl complimenting them?( what if this guy never got a compliment and did so for the first time?)?
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