Why the hell does he smirk each time he sees me?

My crush has known I've been crushing on him since one month. Each time he sees me he is smirking. Sometime he'll smirk and look down at his desk. What's with the smirk? He's 28

One I'm not ugly. I get hit on a lot. I don't get it...

The hell is up with that smirk!!

I've seen him check me out and I was possibly thinking because he found out, he's observing me. Its been long enough... Thus tells me more. But that smirk...
Why the hell does he smirk each time he sees me?
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