When a girl says something about a guy to another, it keeps him guessing if she really likes him?

Anonymous
Today I was talking with this guy that at least, seem attracted to me. I asked him if he know my friend that works in the gym he goes to work out.

If this happened to you, would you be jealous and think that the girl is dating him?

What would be your reaction?
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When a girl says something about a guy to another, it keeps him guessing if she really likes him?
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