He's dark, not good looking at all but I have a crush on him just because he has a crush on me and the way he acted around me. What does this mean?

This guy has a crush on me (I suspected). He's not good looking at all but I developed a crush on him on the 2nd day just because I find it endearing that he tends to be around me in school but acts shy, nervous, quiet, stuttered and dropped things around me, avoided eye contact sometimes. He doesn't know that I like him.
He's dark, not good looking at all but I have a crush on him just because he has a crush on me and the way he acted around me. What does this mean?
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