If I were you I would seriously just ask him. Or ask your friend if she thinks he has feelings for her. Or ask your friend if she could not flirt so much around him..(: that's what I would do.
definitely just text him! he might be seeing if u really wanna talk to him (which means u start the conversation) or u only talk cuz he texts you (he starts the conversation) *good luckk* :)
hes probly thinking the same thing as you so text him. the longer you wait the better the chances of him actually finding someone else because he might think you dont like him
just text him and say "hey :)" because if he told you that he liked you, then he's not just gunna change his mind after a week! go for it, there's absolutely no harm in it at all! if you need anything else, just write it on my profile. good luck! :)