How to convince your friend that he's gay?

Im discreet.I have a friend. he's a famous person, in short, a celeb.It would be rude if i would ask him ,"R u gay?" If i would ask that , he might stay away from me. He never admit himself that he's gay even between of us could know about this. we chat and invited me to go to his house, and take photos, we are masturbating together, but we never had a . His alibi is that, it was only a trip, no malice. Do you think its normal? Guys, help me. I want him to come out or to confess that he's like that because i would be happy if he would admit that he's gay.coz i love him already.Do you have any tricks or tragedy for me to confess to me that he's like that?