It usually means that he is hiding something
no
Well it could be the person is feeling shy of you or is not interested in a relationship but admires your cuteness.
Rodney King
liam hemsworth
He asks if you have a bofriend.
No, unless she secretly does
No. She chose to remain single.
yes trace cyrus
well if you and your girlfriend just started dating she might be shy. shes in a new relationship, or maybe her first relationship. or mayyyybeeeee, shes just not that into you....
Then you leave him, because he's gay.
No, she's not dating anyone right now