I have a troubled 13 y.o daughter who is head over heels in love with a 15 y.o. boy. They have just become a couple, but I'm afraid that he end up breaking her heart. The boy does not have a good reputation, and I have heard he has been in trouble with the police before. I have caught them smoking and drinking together so I'm scared of what he can make her do besides that. I do know they have slept together, but I'm afraid he'll make her do something she doesn't what to.
How can I tell my daughter that he is "bad" for her, without making her just rebel?