I really can't add anything to the experiences and advice others here have shared with you. I think what they said is right on. I'm sorry you miss your friend though . I know how much that can hurt.

But you have done all you can do. Let her have her space but every once in awhile send an email or phone to just let her know you care and are thinking of her. If she does not respond, it's not your fault and keep doing what you are doing, not taking it personally.