My ex girlfriend was 12 when she lost her virginity to her first boyfriend (he was 13).
I was her second boyfriend (though I was much more "real" than him because, well, he was 13.) There was a great deal of trust between us. I was the only person she ever told she was molested by her aunt and uncle when she was 5.
Her outer shell was a very cold and heartless girl. She held nothing back. Especially when she wanted to do damage to someone in her way. She had a very foul mouth and made fun of probably every person alive when we hung out.
And she did have a fragile little girl in her heart. I always imagined it that way. I always felt accomplished when I made her cry because I knew that I had broken through her walls and reached that little girl. She would be so different then. She'd be cuddled up to me and sobbing and so soft. She was just so different. I adored her for it. THAT was the REAL her.
And not everyone wants to be held and loved. Get real.