He tried to hide his smile while talking to me?

I ran into my crush who is the guy I have been seeing. When I looked him in the eyes while talking I definitely saw the spark in his eyes and he tried so hard not to smile at me the whole time. You could see how he was struggling not to get smile like he had this really happy smirk he gets sometimes around me. He was really looking right into my eyes and would not let go, does it mean anything?
He tried to hide his smile while talking to me?
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