Go to the library and read "Introvert or Extrovert" by Mary Sheedy Kurcinka, an article in the February 1992 issue of Working Mother magazine. If your child is more of an introvert, she needs quiet time and time alone to recharge her energy. If she is an extrovert, she charges up by talking with others.
On the other hand, the problem many parents have may simply be the topics of conversation. Teens don’t always like to be the topic under discussion. Try talking about your memories of being a teen.
This will take the pressure off her and put the focus on you. It may also open the door if she wants to tell you about something important to her.