Re: Girlfriend can't express her feelings
Age 16 is very challenging. You are both experiencing many new types of emotions that you both may not understand. Based on what you are describing, there is a good chance that your girlfriend is either afraid or embarrassed to discuss what is bothering her. At that age, people often feel as if they cannot trust anyone with certain secrets. I would suggest remaining patient and letting her know that you are ready and willing to listen to her whenever she feels comfortable talking to you.
Do you both go to school? If so, do you have counselors at your school? I know things are different in the UK compared to the US but here, most schools have counselors that are trained to talk to students about personal matters and help students through them.
Lastly, I have no way of knowing the full situation that you are both in but sometimes victims of abuse can act this way. If you believe there is a chance that someone is mistreating your girlfriend, it should be reported to the appropriate authorities so she can be helped.
Good luck to both of you.