Why was this guy staring at me so intensely?

I saw this guy 4 years before and we had a “love at first site” moment (obviously it wasn’t actual love, just clarifying that for the people at the back that take everything literally).

One day I’m walking in town with my friend and I feel someone’s eyes on me. It doesn’t feel like good attention but I just knew someone was watching cuz I could feel his eyes on my face. I look up to see the direction I was getting that feeling from and there they are. A pair of brown eyes kind of glaring… I instantly look away so I didn’t see anything beyond the eyes just yet. I purposely ignored this person and looked to their side although they probably thought I was making eye contact as they were about 7-8 steps away from me and walking in front of me, pretty sure someone can’t tell if you’re not looking straight at them from that distance. Anyway he wouldn’t take his eyes off of me for a good 20 seconds at least. My friend noticed too but went on her phone instead so she tuned out of the situation. After he finally looked away he then looked at my friend when he was passing us and that was that.

Why was he watching me like that? I don’t think it felt romantic, it was creepy. I can’t tell if he was unsure if it was me and wanted to see my reaction to seeing him or if he was just giving me straight up dirty looks

Why was this guy staring at me so intensely?
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