That would depend on local legislation and who 'you' are.
And you can not get in touch with the mother? Call the boyfriends parents and say the child is not allowed to move out. It would be underage sex and illegal. If his parents allow it they can get into legal trouble for it and the CPS would get involved. A 13yo is not allowed to move out without parental permission and there has to be a guardian.
You can, but I for one would not recommend it
No you have to be 18.
"lieu" ... only with the court's approval
depends on the laws in your state every state in the u.s. is different.
Unless someone other than the child's parents has legal custody, I see nothing illegal about this.
You used the word child. And legally they are a child and the parents decide where they are to live.
In the state of Vermont, the legal age for a child to move out of their parents' house is 18. Parents may have legal obligations to support their child until they reach the age of majority.
No, you must respect the parents wishes until you are over the age of consent/emancipation.
Until you
parentel concent.
yeah because the parents of the child trusted the other parents to take care of their son/daughter