I guess it boils down to what his needs are. Obviously, he’s self-reliant enough to go away to college. That could be good for him if he has a full ride scholarship. If he can responsibly function as an adult, then he’s better off than a lot of college students his age. Just be sure you can give him a way out if something goes wrong. If you have a bad feeling about sending him away, then let him know your concerns. You get the final say on where he goes.