You have developed emotional dependence on her. Some times, introvert person like you are hooked to one secure emotional relation, develop a kind of pathological attachment i.e. always live in that relation, and think nothing else. If you want to come out of this dependence, start working and keeping yourself busy. Cultivate some purpose and goal in your life. Do not try to share everything with her, rather develop individuality and have some thing personal.
It is a good idea to consult psychiatrist so that you can discuss other areas like your family life, past experiences, emotional issues etc.