What does it mean when a guys face lights up whenever he sees you?

Do guys face only light up when they find someone attractive or is just because that’s their personality? Like me and this guy have been talking to each other and we FaceTimed and his eyebrows raised, his eyes got bigger and he kept smiling. I don’t know if he was just being friendly or if he actually liked me
If his face lights up he likes you
Just a friendly reaction
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What does it mean when a guys face lights up whenever he sees you?
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