Does this mean he is attracted to me?

occasionally when I am in public, I would be minding my own business then I would catch a guy stare at me. When I stare back, he would continue staring at me with no expression. It would get awkward and I would feel shy so I look away and never look back. Then he would look away. does this mean he found me attractive or is he just staring cuz he noticed something about me?

Does this mean he is attracted to me?
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