I am starting to become very worried about my teenage daughter. She and I have always been extremely close. She is 15 and has been dating her 16 year old boyfriend for 12 months. He has very engaging ways and is reliable, trustworthy and totally devoted to her. The problem is that he is extremely possessive and doesnt seem to be able to control it. He has manipulated her mind, I think. they go to the same school, spend all day together and most of outside school as well. She has lost her group of girl friends, and has no other friends besides him. He used a great deal of pressure to get her to give up all of her extra-curricular activities, using vague threats of losing him if she didnt because he hated to share her. He hates it if she is friends with or even laughs with other people, although he is getting better at coping with that. He doesnt like her going to salons, wearing make up or even getting dressed up. He would flip if she went out without him. He uses psychological pressure on her e.g. he withdraws and becomes distant if she does anything that he doesnt like e.g. sit with someone else. She gets very distressed at this and so tends to act the way that she knows he wants. He is not talking to me at the moment because I invited a young girl to stay at our house for a few nights. He told me he was mad because I didnt ask him and also because he cannot bear to have someone else living at her home, even if only for a few days. He and I were very close but I now I am very worried about him. My daughter idolises him and it would break her heart if I attempted to split them up. Unfortunately all this is affecting my relationship with her because I am very disappointed in her that she is still treating him the same even though he is being very rude to me. Am I being unreasonable expecting her to tell him to stop behaving rudely toward me?? I dont really know what to do, whether to start restricting her from seeing him, whether to act happy and hope that it will all be ok, or whether to tell her honestly how disappointed I am in her. I even worry that I am upset because I am not used to having to share her and now it is like she is just not "there" anymore. I have told her that I am not going to be as nice to him as I was because that would be as though I am legitimising his behaviour. I am divorced and in a way I think he also has sort of become a father figure to her. I would like some advice because I can see her at 15 not being able to explore her personality and not developing into the person that she could be. She seriously believes that she is going to marry him. I am pretty sure he feels the same way.