His friend laughs whenever I speak to the guy I like?

I approached the guy I like and began speaking with him, and he’s acknowledging me as well. All I hear is his friend chuckling to himself because he was in the room too but his back was faced to us. Why would his friend laugh when we’re talking? This happened twice today. And other days his friend would smile at us when I’m speaking to the guy I’m interested in

His friend laughs whenever I speak to the guy I like?
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