What is Amir's relationship with Baba in The Kite Runner like?

Early in the novel Amir is constantly vying for Baba's attention and often feels like an outsider in his father's life, as seen in the following page: "He'd close the door, leaving me to wonder why it was always grown-ups time with him. I'd sit by the door, knees drawn to my chest. Sometimes i sat ther for an hour, sometimes two, listening to their laughter, their chatter." Explain Amir's relationship with Baba.