What are some reasons a guy would have tears in his eyes when looking at you?

Anonymous
the guy I'm dating, sometimes I could see tears at the end of night when we say bye. It makes me wanna cry but I try not to in front of him.
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+1 y
this is like my other question, but does anyone know other ways i can show him i like him a lot other than obvious things like gifts, sex & compliments?
What are some reasons a guy would have tears in his eyes when looking at you?
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