Guy's Behavior

Any idea on what this behavior means?

There's a guy in my class who gets tense whenever I'm near him and looks away from me whenever we run into each other. He seems to be fine with other girls and guys, but changes behavior around me. Even though we get along swimmingly when working on assignments together, he always seems to be nervous and quiet, a bit of a contrast to how he usually is.

I've noticed this with a few other guys in my classes as well.

Is there something wrong with me or am I just overthinking things?

Any idea on what this behavior means?
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