Why does he only look at me when I'm not looking at him?

Anonymous
I like this guy so much but I'm super shy around him. So, I cannot say "Hello" or "Goodnight" to him although I'm totally friendly with others. He used to be a lot more friendly towards me but now he talks to me only when necessary (but still nice to me). He never initiates conversation anymore when we're alone. And, he only looks/stares at me only when I'm not looking at him and most of the time, he kind of ignores me. I wish to know what is going on in his mind. He's in his thirty.
Why does he only look at me when I'm not looking at him?
4 Opinion