I Have Full Custody of a Child that has Just Turned 18, Am I Still Responsible for her?

I live in NJ and one year ago I was granted full legal custody of my child’s 17 year old friend. She has now turned 18 and is a high school senior. Am I still legally responsible for her? Or does it terminate on it’s own? If so, at what point does this happen? Do I have to go through any legal channels to dissolve my responsibilities?

In Florida, Can A 17 Year Old File For Emancipation Without Parental Consent?

Does a 17 year old have the legal right to make the decision not to live with her parents without her parents consent, in the State of Florida?

Emancipation in the State of Oklahoma?

Can you give me the Oklahoma State statutes concerning emancipation?

Can a Minor with a Baby Get Married Without Their Parents’ Consent?

Can a minor with a child get married without their parents’ consent?