Positive Peer Pressure
If you look at your semi-close group of friends and don't feel some deep, internal pull to step up, to best yourself, to see what more you can do... you probably don't have the right group of friends. It's the kind of peer pressure you should seek. The positive peer pressure that raises your own expectations about yourself.
It's one of the easiest ways to manipulate yourself to be more.
And, yes, it is the root of the idiom "you are the average of the five people closest to you"