What's happening here?

So there's this guy who goes to my uni and ever since I glanced over and smiled at him, he began doing this thing where he'd hold eye contact with me. He stands afar, tries to lock eyes with mine and doesn't let go- idek how he stares continuously for that long without getting exhausted. Even if I try ignoring him, he doesn't stop. Sometimes when he sees me he'd freeze in his tracks and just stand there staring at me. He only stares from a distance and altho I tried approaching him he wouldn't respond.

What do you even call this? It's been going for a year. We're 21.

What's happening here?
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