She sounds like a great puppy. You want a pup to be outgoing and friendly at this age. GSDs take a while to grow into their defensive drive, and in the meantime, they need to learn discernment--friend from foe. The more socializing you do, the better the pup will be able to determine who the good people are, and in so doing, they are better equipped to recognize who the bad people are.
At this age, everyone should be her friend.