I know a 17 year old boy, and we think he may have a mental problem but we are not sure of what kind when he was about twelve he was diagnosed with add but he never thought that he had it so he wouldn't take the medicine, here is some of his actions 1. h

Since : Since the person in question is under the age of 18, it is up to his parent or guardian to take action. The first thing would be to talk to him and ask him directly if he is dealing with any serious issues/problems. The above points you listed sound like the behavior of someone abusing drugs or alcohol. There could also be an underlying mental problem. Hopefully his family.Guardian can get him to open up and get him some help.