Why would a guy always walk past you?

Anonymous
It's a guy with who I have a lot of eye contact. I also overheard him talking to his friends about me as the 'hot' girl, his friends now look at me a lot and one of them pushed him towards me. Though, he didn't try anything (me too).

He now still look at me but more from afar than when he is closer. He also quickly look, look away and look back.
But that's now the second day he does this:
I'm in the hall at a table with my friends and he, alone, goes out of his class to walk past me. I wouldn't consider this as suspicious if he did this only one time.
The thing is that he knows I always sit there these days at this precise hour.
It usually happens like this: he goes out of his class, walks past me, looks at me quickly, sometimes look over his shoulder after. Then he walks past again to go to his class. A few minutes after, he does this again. Also, one day, he walks past me in the same situation except the fact it would have been simpler and he would come back to his class faster if he didn't walk past me. It was a kind of detour.

Why does he do this?
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Why would a guy always walk past you?
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