She obviously is not ready to commit in a relationship. So the obvious thing to do is to let her go. Adn please do not give in to the temptation of allowing her to yo yo you back and forth. She either is ready to love you completely or she is not. This does not mean it will not change the way she feels la tr on. Just do not waste time waiting around for her. Find someone who will feel the butterflies for you. After all, don't you want all or nothing? Good luck to you!