In every state, the age at which the child can decide whether or not to visit his parent is 18. A judge may or may take the wishes of an older child into consideration but is not bound to do so.

However, if there is a court order that the child visit his parent every weekend, then you as the custodial parent are required to see that he does. Until or unless the order is changed, the child MUST follow it. At no age, as long as he is still a minor, is he considered "old enough" to disregard a court order.