I know you

Girl: *calling* Hello?
Boy: Yes?
Girl: It's me.
Boy: Yeah, I know *smile*
Girl: What? *surprised* Wait, how did you know? This is my new phone number.
Boy: ...
Girl: Hello? Anybody there?
Boy: I know you. I know your voice. I know your new phone number before you tell me.
Girl: You asked to my friend, right?
Boy: No. Of course not.
Girl: Then?
Boy: Because, I love you.
Girl: *speechless*