Co-worker’s fiancé?

My coworker all the time talking about her decent gentle and handsome man, and hows he treating her, in just 3 months i knew everything about them, and i saw him treating her like what she told me, and i felt how much he’d die for her…
Sometimes her fiancé come to visit her and sitting waiting for her to take her home after we finish in work
And while he’s waiting for her, I caught him looking at me more than once , it’s just funny how our eyes met and now, I’m confused cuz you can tell how much he loves her
But why he’s doing that?
Co-worker’s fiancé?
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