My teen is going through a disengaged period. He is nearly 17. Spends most of his time in another room, avoids sitting at the table with our family because it’s “small talk”, grades suffering, sees less of his friends these days and mostly his girlfriend, lies a lot, no interest in his future and next steps. Keep being advised to let him be and learn from his own mistakes but it is so hard. Am I best to leave him to work things out himself and be here for when he is ready, or do I intervene? We try talking to him in the car but he just gets defensive. Prefers us not to speak. Prefers us to leave him alone and just agree to everything he asks for. He is moody and argumentative all of the time. I know this is typical for teens. For those who have been through this already I would welcome tips and advice.