I get that your son is a good kid. Unfortunately, giving into his demands when you have a current court order saying otherwise could end up with you being found in contempt. You have about 9 or 10 months between now and summer to go to court and request a modification of the current order based on the change. So go see what a judge says about it. Be prepared to find out though that your son will still be required to go visit his dad in the summer, and possibly during school breaks as well at Dad's expense should he request it.
If your son was a model child but refused to go to school, would you tolerate that? Probably not. So why are you entertaining the idea that your son can refuse visitation with his father?

