Is he really being observant?

I confronted this guy I work with about him staring at me all the time. And he chalked it up as him just being observant. Like dude you stare at me almost everyday/glance at me. Even I caught him doing outside of work, he knew exactly where I was and when I was looking around in the crowd and saw him, his eyes was already locked on me. Like do you have to make an observation on me every day. He could just be observant person who knows.

Is he really being observant?
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