If your best friend is your workmate, company decides to promote one person only,both must apply for the promotion,he doesnt know will you tell him?

Yes I have to.

Stop kidding me !!!    Best Friends mean no secrets. 

Yes

sure will do, i should get it because iam the one who deserve it otherwise it have no meaning

 .ofcourse i'll tell him. i don't wanna  lose my friend just for a promotion, because sooner or later he will figure it out

Yes, of course