How would I know if a guy was trying to get my attention by loitering but he never spoke to me?

Anonymous

I mean, if he semi followed my a couple of areas in the office and was near enough to say my name and get my attention. It didn’t look like he had a purpose but tried to make small talk with someone near then quickly left as I was finished helping someone. I looked for him but I couldn’t find him anywhere

Apologies, it all sounds a bit odd.

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Any ideas
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How would I know if a guy was trying to get my attention by loitering but he never spoke to me?
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