Girl,
You are not an empty shell. What you're feeling is perfectly normal after all the abuse you've suffered. Unfortunately, you've had to bury the real you in order to survive. She's still there, deep inside, and you need to coax her out again. Unfortunately, she's having trouble working her way through all the hurt and pain under which she's hiding.

Look at your profile pic - not the Avatar pic, the profile pic. That's the real you. The loving, gorgeous, caring 14 year old kissing her little puppy. She is there still.

You have so much on your plate at the moment. More than anyone should ever have to deal with. Take strength from the people on these boards. We'll be here for you, even when others seem to have deserted you.