Not sure this is in the right forum, but I really think it's a mental health issue.
My niece (brother's daughter) is 20. She left school when she was 16 and has done nothing since. She is not claiming benefit, is not in college and not in any type of employment. She has no qualifications as she did not go to school to sit the exams. She spends her days in the house, watching boxsets or playing on her games console. She has no friends and no social life. She has no social skills either, when we visit - which is not often as we live a considerable distance away - she doesn't talk. You get a grunt if you're lucky. Her lifestyle is being supported by her parents.
Brother puts niece's lifestyle down to "anxiety". He says niece was upset by the death of close relatives in her early teens and had a couple of sessions of counselling, but decided that she didn't want to go, and they didn't push it. Similarly when she started school refusing, rather than explore WHY she didn't want to go to school and seeking treatment for her, they colluded with her and let her do what she wanted.
I also believe that in the past my niece has threatened suicide - has never made attempts or done anything alarming, but her parents are so terrified of her doing something to hurt herself that they just go along with whatever she says. Sister in law suggests niece should see GP to discuss issues. Niece gets upset, threatens to kill herself, sister in law and brother back off and niece goes back to her boxsets.
I am finding the whole situation very frustrating and such a waste of a young life. We have suggested that the parents go to the GP and tell him/her what is happening but you can't force someone to accept teatment if they don't want to, can you?