Just cant do it

I have raised 3 kids, life has not been perfect let me tell you.  But I did my best, I did so many things with them, spent so much time with them.  Told them everyday how much they were loved.  Then one day my daughter meets a boy who is messed up, she believes she can change him.  She is only 17 so what does she do she tells me she is going out, and she leaves with her stuff to move in with him.  He is on medicine for sociopath, he tried to stab my son, and made death threats to him, yet she still believes he is changed.  I went to just deliver a letter to her the other day, I didn't even see or speak to him.  My hubby and I talked to her told her we love her, miss her and want her to come home.  She hugged us and was crying.  Then we get home and the police call us and tell us we aren't allowed there.  Yet at the same time she told them she wants contact with us?  So if you aren't allowed there and you cant talk to him, then how do you have a proper relationship with your daughter, I don't know how to do this anymore.  I told her I love her last night by text and reminded her of an appointment.  This morning I said morning I love you.  She never texted back for like 12 hours so of course as a parent you worry.  So I simply asked her to text me and let me know if she was ok, cause I was worried.  She flipped at me, she has never been so rude to us till she met this guy and yet we are the ones that she says is doing everything wrong.  I just don't understand.  Im so hurt and don't know anymore, I haven't ate proper in two weeks, I haven't slept much.  Ive lost about 10 lbs in a week just from stress.  And she accuses me of it being all about me.  Im a worried mother all I was is a text every day to say hi mom, im ok how are you.  But apparently that is too much to ask.

lost daughter=broken hearted mom

Have no idea where I went wrong but my 17 year old daughter left us for a guy who is no good.  He is a druggie, and he has somehow brainwashed her that we are not needed in her life.  The past two weeks have been hell. Today I go there to give her a letter, and when I get home the cops call me telling me I cant go there anymore.  The fucking guy tried to stab my son a couple days ago and he even sent him death threats, yet my daughter can still not see the light.  I love her with all my heart and am so scared for her, I don't know where to turn or what to do anymore.  I'm falling apart, I don't know how much longer or if I even can hold it together anymore.  cops even say there is nothing I can do.  How do you protect your kids when you have no rights as a parent anymore. 

Wish she would realize that family is always there for you and no guy is worth destroying your family for.