He stares at me when I don’t come up and talk to him? is he expecting me to talk to him or is he just looking?

I’m the only girl he talks to since he’s really shy and so I’m always the first to initiate the conversation and I don’t mind but I walked past him and I could sense his glance. Even though I know he is not interested in a relationship? Or so I heard..
He stares at me when I don’t come up and talk to him? is he expecting me to talk to him or is he just looking?
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