Is this a thing or is it insignificant?

Every time I cross paths with my cute neighbour he always has a big smile for me. We barely know each other... that being said he has always been nice and kind to me. Our chats are getting a little longer... last week he briefly mentioned he was going to be away for business trip and how he wasn’t psyched about it due to covid... today I ran into him while I was with my boyfriend... he was still nice but was mostly looking at me when chatting as he barely knows my boyfriend.

Is it common for you to greet your neighbours with a big smile every time even though you don’t know them much?
Is this a thing or is it insignificant?
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