Is it normal to imitate the way of being of my best friend?

I usually act like him. When I don't know how to do something, I think: 'What would he do'?. With my friend, we're like 'father and son', we have this kind of relationship. For example, when I get bad marks, he gets a bit angry and tells me: 'If you want to have a good and safe future, you have to study hard'. He doesn't slap me or shout me.