Uggh..teenage love. When I was 15-16(and didn't need a stupid bf) I was with a real loser. After meeting him once my parents said I couldn't see him again. I thought they were soooo mean, never imagined my parents knew what they were talking about.
So, I started sneaking around to see him. This included sneaking out my bedroom window until I got caught. I had to keep my bedroom door open from then on so they could tell I didn't go out the window again. Then I started lying. Uh-huh.......I'm at my girlfriend's house, library, movies, all the classics. And I was with him. And I got caught a few times in those lies, but since they had to let me go to school I kept seeing this loser.
Painfully long story short, I stopped being with him. And this is the tough part (and the part I dread if I have a daughter) - my parents did all the right things and were powerless to stop it. They drove me to school, picked me up, and stayed involved like so many parents don't. It was just a life lesson I had to go through, I learned things I still apply in my life just from dealing with his disfunctional self.
In retrospect my parents did factor in my decision to stop seeing him. They raised me in a place of love and respect so I knew inside (but would never admit for some reason?) that I wasn't being treated right. I would hear my mom's voice in my head saying she doesn't like the way he treats me and it would crush me inside, because our family was close so that hurt too. When I got sick of being in a bad place it was eventually over.
All you can do is hug her and give her all the love she deserves. I know it breaks your heart but have faith in how you raised her and faith that she will come around. I'm so sorry (