Guy who has a crush on me avoids saying my name, what's that about?

He calls me "hey" and never says my name. Never. He also has a crush on me cause he spends a lot of time looking at me and not looking away when I catch him. Guys, why do you refuse to say a girl's name?

We are in our 20s.
Guy who has a crush on me avoids saying my name, what's that about?
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