AS far as I know, in most US jurisdictions, a minor is in the custody of his parents except that under certain circumstances they become a ward of the state,
Regarding the topic of mental depression however, it is wise to understand that any visit to a psychiatrist will result in a psychiatric record for the patient and any statement made to a psychiatrist is like talking to a friendly cop; he writes down everything that the person says and it becomes part of his permanent record subject to disclosure by a Court Order and such psychiatric record will be used against the person if he ever has a problem that warrants it. Also, if the person is ever arrested for any reason, the police may ask or the booking department that processes the arrest will ask the person about his psychiatric history and guess what? If the person answers truthfully they have cause not to release the person.
Now let's say that someone with a psychiatric record avoids getting into trouble with the law ( and since he has a mental history, he'd better!!) any application that he fills out will ask if he has a mental history-and guess what? If one lies, one is subject to penalization and if one admits to having a mental history they have a reason to deny the application. In the US, mental depression is classified as mental illness and guess what, from the perspective of the law, that makes the person a loony.
But sometimes an adult person just feels very depressed and feels that he needs medical help or feels that he needs someone to talk to, in such a case a medical doctor is best qualified to help such adult person. Mental Depression is a very broad topic and there are various ways that doctors treat patients with such an illness, usually with medication with psychotherapy but sometimes only with medication and sometimes only with psychotherapy. They try to get to the root, either organic depression or exogenous depression, but whatever the case, depression results in a loop reaction: chemical imbalances causes negative thinking which in turn causes chemical imbalances with in turn cause negative thinking... Medication helps for a while but in time the medication is no longer effective because the body builds up a tolerance to it. People that suffer from depression should never ever ever drink alcohol or any cns depressants such as sedatives ( unless your doctor recommends it) People can tell you what helps them but it may not be what will help everyone. A qualified professional must get to the root of the problem, isolating it before they can recommend the best treatment to specially help the affected person. Getting help for depression best comes from a medical doctor and not from self treatment or from conclusions from information posted on the net, The first step is to talk to someone that loves you and that wants to help you. You can beat depression at least to the point where you can deal with it if not defeat it.