^ Lol, don't base everything on what your friends use, theres a whole world outside your circle of friends.
If you look at the worldwide market share of BB, Android, iOS, Windows and others you can clearly see that BB is standing in death row and is only popular within 3rd-world countries. Even corporations which use Blackberry due to its high security are moving towards iOS and Android. Then, take a look at the worldwide use of messenger apps - Whatsapp, Kik, Facebook, Kakaotalk, Skype, Line, Viber etc. and you'll see BB losing popularity.
I agree, BBM on the Blackberry platform is the best messenger app available now - but only because its integrated within the Blackberry OS. When it comes to cross-platform messaging, they have no experience.