Guy's Behavior

What does it mean when a guy is speaking but he's staring at the person who isn't looking and when she looks he doesn't break eye contact?

Attraction
Nerves
Habit/ confidence
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A total of 8 votes were cast: 2 girls and 6 guys. See detailed results
Updates
5 mo
He’s looking at her eyes…. He actually has a girlfriend (later found out)
What does it mean when a guy is speaking but he's staring at the person who isn't looking and when she looks he doesn't break eye contact?
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