"Real Friends" is used to a describe a friendship between two people that completely understand each other. It's the upper echelon of all friendships and is even ranked above the relationship. Keep in mind though that the "real friends" are not gay, it's just that their friendship is so strong that even a heterosexual relationship between a couple cannot compared to the strength of this friendship.
Brandon: Real friends dude, Real Friends
Andrew: You know it!
the real friend that tells you never to worry about the things you cant change.
No matter how long you are apart you can pick up right where you left off with them.
Beth has never been a "real friend" but I never thought she would betray me like that.