Gini, Emma's story reminds me of Cataholic's Minnie. There's a thread or two somewhere (can't remember which forum), or maybe Jo will see this and reply.

All I can think of is maybe she is nervous because she's lost her place as Annie's best friend and isn't sure about her place in the hierarchy. She may eventually become closer to you in her own time - I hope so. I agree with NoahsMommy, let her do things on her terms and she'll let you know when she's ready for more contact