Guy still staring at me years later? Could it mean anything?

I went to high school with this guy back in 2014 and seen him staring at me a couple of times. It’s a very long stare. I seen a few days later after years later he stared at me the same way. I didn’t know he was staring at me until my friend told me a guy was looking at me and asked if I knew him. When I looked up it was him.

Guy still staring at me years later? Could it mean anything?
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