Why is my male neighbor copying me?

First he is 41 and im 37, second I wore a royal blue shirt the other day with sweats that had a stripe down the side he wore the exact same thing the same day. Third I burned my garbage and he came out and started burning his, he stares at me and smiles a lot showing his teeth but barely talks to me, I'm just trying to figure him out. Also he has a girlfriend and I have a boyfriend but neither of us are married 😔 the list could go on but you get the idea does he maybe gave a crush on me or whats his deal 🤔
Why is my male neighbor copying me?
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