I'm going to tell my friend that michael scott from the office gets assassinated at the end
Why would you tell fake spoilers?
Yes, he has been spoiling the end of all the good movies we watch while we're out.
Has anyone told your friend his behavior is ruining movies for you and others? If that's the only way get through to him, I'd reluctantly agree that you should try it.
I do want to tell him but he's my friend so I don't want portray him in a bad way.
Then I believe it's wiser to not follow what he is doing and retaliate. Isn't your friendship more than getting into arguments about shows and spoiling things? How about just telling him upfront, and refuse to watch with him if he keeps doing it?