I'm not going to let my neighbor park in the driveway I pay for
Are you mad at him?
Yes, I want to make a point.
It's understandable that you wouldn't want him to park somewhere that you're paying for. Tell him to find his own parking spot somewhere else.
Yeah, I'll tell him to park in front of his house.
There's nothing wrong with telling someone that you own the driveway and they can't part there. Try to stay polite and let them know what other parking spots are available.