What does it mean, if an uni professor (man) and a student (girl) lock eyes a lot during lecture?

Obviously thats his job to look at students while talking, but i realised that he looks at me a lot more than others, and for like 3-5 seconds, which feels like a lot. And when he jokes around he looks into my eyes.

I feel like a jerk after writing this question, and awkward but here it is.

What does it mean, if an uni professor (man) and a student (girl) lock eyes a lot during lecture?
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