How do you tell someone that he is cheap?

[Sanity Claws]

And that you are tired of it.

Someone else here asked for advice on how to handle a situation. I thought I'd post because I'm thinking of ending a friendship because of how cheap he is. He just doesn't pay his share.
For example, if we're at a restaurant, he waits until I put down my money to pay for my share and then he takes out his wallet and pays the rest, using some of my money to defray his bill. I wanted the extra money to go to the waitress. I exploded at him once and he stopped, for a while.

We take a drive out of town and he doesn't pay half the costs. I'm talking gasoline and tolls only; I'm not adding anything for wear and tear on the car. I exploded at him about it about a month ago and he paid his share for that trip. Then we took a drive last week and as he was leaving, he said, do you want me to pay anything? I said Yes. I'm pissed that he asked that instead of just paying. He still has not paid for that most recent trip.

The more I write, the more fed up I am.
What would you do?