Why does he walk towards me, stare at me at a distance of 3 meters, then react annoyed or frustrated when I don’t react?

He did this several times before and after finding out I had a crush on him. He would stand right in front of me and stare for a few seconds, then sigh annoyed or frustrated when I don’t look up, and sit right in front of me but never talk to me and later deny he ever had any interest in me. Why does he want my attention so badly if he doesn’t like me or consider me low hanging fruit?

Why does he walk towards me, stare at me at a distance of 3 meters, then react annoyed or frustrated when I don’t react?
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