:salamext:
I think you should explain to her that she's not doing the right thing. She probably already knows this though, so try to think ahead in the future for her - explain to her that this guy that she wants to live with, why is he allowing her to do that? Is he just doing it because he's expecting reward from Allaah? or is he doing it to take advantage of the fact that she's innocent, so he can do whatever he wants with her?
She might not believe you, but explain to her that guys do take advantage of girls alot and this is obvious, tell her to think about it; is he doing all this because he expects a payment? Or is he doing it so that he can get reward from Allaah? Or is he doing it because he's got the chance to prey on a girl who hasn't got much experience in the world, which means that he can do whatever he wants to her and she won't know what to do about it.
She won't even want to run back to her parents because he knows that she would face bad consequences, and she wouldn't want to tell the police because that gets matters too complicated; so he's not afraid of being caught or anything.
If she feels that the guy won't do anything and she trusts him, if he's going to take her clubbing - what actually happens there? Does she really want to lose her chastity to someone she doesn't even know? Someone who will give up on her because he thinks that shes just a toy?
If she really want's a good life - why not try to work hard on gaining her parent's trust so she can have that freedom with her muslim friends? They can do fun things too, and if she seriosly thinks that fun is getting pregnant at the age of 16 from some stranger she doesn't even know, and later on that stranger will throw her away and probably even abuse her - while she has no family or friends to back her up, then she might want to go ahead and do that.
Did you know that guy's like this call themselves 'players/pimps' - they do this to alot of girls and feel proud of the more that they have - they think that their some bigtimers because they have more gyalz than some next man. So if she feels that she's "special" because this guy wants her to come over, then realise that he's probably done the same to alot of other innocent girls. Some even go to the extreme of forcing the girl to take serios drugs, and later forcing her into prostitution because she's heavily addicted to the drug, and he won't help her out.
This is the real world that we're living in, it's corrupted from all sides - this is why her parent's are trying to protect her. Maybe they should allow her to have some freedom with her muslimah friends, but if she want's to enjoy it in a haraam way - she'll fall into a dark trap which she'll find hard to get out of.
But you know what? Alhamdulillah (praise be to Allaah) - none of that has happened yet. She isn't with the guy, she isn't addicted to no drugs, and she hasn't lost her chastity. She's still safe with her parents, and she has a friend like you that want's to help her out.
Make her think of the consequences, and remind her that people always have a reason to why they do what they do - whether it's good or bad. And tell her to realise that if she want's a life which will lead to evils, Allaah will make that life easier for her, but if she want's the true enjoyment in life of islam, then Allaah will make that path easier for her too. The real life is the afterlife, not this corrupted world that we're living in.
O ye who believe! Enter into Islam whole-heartedly; and follow not the footsteps of the evil one; for he is to you an avowed enemy. (Qur'an 2:208)
..in the end will ye be brought back to Him (Allaah) Who knoweth what is hidden and what is open: then will He show you the truth of all that ye did." (Qur'an 9:94)
Allaah Almighty knows best.
:wasalamex