Parents may think they are irrelevant to their adolescent and feel threatened and rejected. Trust you have done a good job to prepare your child for adulthood. Your primary role is slowly coming to an end. It is time for you to re-invest time and energy in yourself and your relationship. Look to your own future without your child.
Problems can occur when teenagers are either over parented or under parented.
Over parenting is when parents demand total obedience. They have clear and rigid rules and strict punishment. These parents believe their views are always right and their child's views are not important. Such a parent might find their child becomes resentful and rebellious. Under parenting gives the child no limits and can result in them being self centred.