What does it mean when a guy looks whenever you’re talking to another guy?

There’s a guy at work who’s always friendly and greets me; he’s never done or said anything inappropriate. We’re both in our 20s, and he has three kids and a girlfriend.

I’d never cross any boundaries, and I don’t know him on a personal level, but he’s nice. I’ve noticed that when I’m talking to other guys, he sometimes looks over, walks by, or comes back into the room.

What does it mean when a guy looks whenever you’re talking to another guy?
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