I couldn't have said it any better.A friendly, outgoing pup is a GOOD thing. Don't dare try to keep him from being "too friendly". At this age, he should consider everyone his friend and the world should be a wonderful place. Far too many GSDs exhibit the opposite behavior--frightened and skittish around new people, dogs and situations. You should be happy that you have such a confident, happy pup!
As he matures, you may find that this friendly nature remains, or you may find that he becomes more aloof toward strangers. Either way, don't try to make him distrust people. In most cases, even a friendly GSD will notice a "bad" person and his behavior will let you when someone is not to be trusted. It takes a while for pups to learn this kind of discernment, so be patient.
In the meantime, keep socializing and let him meet all different kinds of people... men, women, children, old people with canes and walkers, people with umbrellas, people wearing hats, big tall people, disabled people, and people of different ethnicities. The more people he meets, the better his discernment will be in the future.
Guess we are just saying we think you got a great NORMAL wonderful puppy. Frankly, I'd never take on a puppy unless it was exactly how you described.Thank all of you guys for your responses,just an FYI for everyone it's not a problem that he's so friendly,I just find it crazy that he's so young and like that.