I felt the same way when my son was 19, it was terrible, i can't go into it but many people told me to ring the police, get him out, disown him,
I did not take their advice as i had promised my Mum i would never split up the family no matter what. despite it all i kept my word to her, don't know how I did it, but i think it is like childbirth, you forget the pain in time.
My son is 25 on Sunday and still can be hard work, but he is an adult now, with a child of his own, and i am proud of him. Nothing your child can have done could exceed my son's behavior, but I put up with people losing patience with me and calling me soft, and now i have my son back and we are solid, i thank my late mother for her advice,