he's old enough to work and contribute to the family expenses. we hear people lamenting the fact that they can't afford what their children want. if the children want it badly enough, let them work. or learn to understand what money REALLY is and how hard it is to come by.
my kids were the same way and we made them all get jobs. the girls made and sold french bread and the boys worked in grocery stores. end of *****ing. they saw how hard it was to earn enough for their movies and cokes. spare the child from the true world and end up with a lot of pain.
take care of yourself and chill. let him stew. but push the job idea. he'll gain self-esteem and some money.