Why?

I don’t know why but this is true me. Why I say like that? I realize that I seldom contact my friends. I found my problem when one of my friends told me that my telephone spending is so low. Yes, I am the kind of person seldom or to say, never contact friends or even relatives. Every times will be my friends or relatives to contact me. I only wait for their calls. But I only call them if I have something special to ask or with a reason. But the reason will not only to say hi or just to chit chat. But this does not mean that I don't concern about the friendship with them....

Why my styles like this? I really have no idea. What kind of attitude I am?