well he seems pretty interested but he's at the stage of getting to know you and flirting and stuff. Alls you can really do is wait, if your willing to, if hsi mates said he's going to ask you out but then he didn't, well maybe he's a bit unsure and needs a bit more time.

Plus if he just got out of a relationship he might not want anything new and just likes the flirting, everyone loves to flirt/being flirted with.