Just keep working with her, she'll come around.

My GSD came from a breeder who was not socialzing the puppies. She wasn't afraid of humans, but she didn't seem to care much. She was kept out in a kennel with very minimal human interraction. It was actually pretty heartbreaking because normally you can squat down and call a puppy and it will come bounding over to you with lots of kisses. But not Rosie, no matter how hard I tried to coax her to me when I first brought her home, she just stood there and looked at me and eventually walked off the other way.

So just keep giving her love and interracting with her and she'll eventually come around. Rosie finally started coming around at about 5 months. It takes a while and it takes alot of patience.