How to add friends on NFS Rivals?

i think you have to be friends on the platform you bought the game.

ex.  if you bought it on origin, all your origin friends will be in your friends list.

Hello how my add friends because my playing in Playstation 4 the nfs rivals and hoe my chat to others player in ps4 

I think if you add friends on Origin then you can add them on your game friends list, does not depend on where you purchased the game.