My 15 year old daughter has been with her boyfriend (16 years)for just over 2months. (I didn't know about him for the first month, only found out about him by chance as she had been staying over at his house whilst she was meant to be at a friends) I had always been very trusting of her up until her lying but we had a chat and she promised never to lie to me again. During this time she has become more and more distant, down and withdrawn, when asked about it she would say she was just tired. Well it's been really niggling me over the past few weeks as she just isn't herself, so as much as it goes against everything I believe, I decided to look at the text messages sent between him and her. I am so shocked and worried for her. I found out that she had sex with him in the first few weeks, which I'm not happy about but I can accept. The worrying parts in the messages are that he has been giving her vapes to get high, when he has sex with her. He tells her she can't have a go on the vape in exchange for sexual acts or she can have banned cigarette after she's had sex with him. And she seems like she really wants the vapes and cigarettes. He tells her multiple times a day how much he loves her and how he can't wait to do things to her and see her again. He's also been pestering her to have unprotected sex which she has said no to luckily. It seems that he makes her worry about him as he says he hasn't eaten all day or that he's fed up with the way people treat him. He keeps telling her that I'm overprotective and that she can move in with him as soon as she's old enough and there's nothing I can do about. He's been to my house to visit her multiple times and I thought he was a nice lad but something was always niggling me as my daughter isn't acting herself. Sorry for the long post.Please can anyone give me advice as I'm worried out of mind and don't want to push her further towards him. She seems addicted to him. She's on her phone constantly to him. Is it grooming? Or am I overthinking things?