Sometime I say "Hey you" to my girl with a lot of 'familiarity' overtone when I saw her or if she called and I recognized her voice. She would replied with a flat and relaxed "Hey". I did not meticulously plan it, that's beyond my acting abilities, but it just came out that way and suddenly there was this nice and intimate aura around us. Very nice. And then we would carry on fighting again - Just kidding.