Guys, Why does my married neighbor stare at me so much when he sees me and initiate conversations? He seems happy when we talk?

I don't know since I don’t run into this situation often. But I notice he seems especially excited to talk to me or like there’s an awkward tension and I don’t understand. He also stares at me a lot even if I’m out walking somewhere and he sees me walk by. Why would a guy do this if he’s married? It’s not just like hello and goodbye but like conversing about things and laughing about them. Aside from that I don’t think he’s being creepy or anything, seems like a genuine person.

Guys, Why does my married neighbor stare at me so much when he sees me and initiate conversations? He seems happy when we talk?
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