What is she never calls me i always call her?

It could be a sign that she is not interested in maintaining a close relationship with you. It is important to have open communication and discuss your feelings with her to see if there is a mutual desire to continue the relationship. It may also be helpful to evaluate if you are putting in more effort than she is and if the relationship is balanced. If the issue persists, it may be time to reassess the relationship and consider moving on.