How did Tom use Grace? (spoilers in thread)
The only part of the movie I didn't get was how Tom used Grace. He even admitted it. You could say he was trying to blackmail her. But she didn't know that, because he said he burned the business card. So he never held that over her head. Yes he was trying to do nice things for her in order for her to be with him, but is that using a person? You can only say he used her after he turned on her after the realization of his anger. But that is more tricking a person, not using them.
It seemed to me she was using him. And by not putting out, she ensured he would keep doing things for her. At least until the end. He was her possible ticket out of the town. Women tend to use nice guys to get them to do things for them. Although nice guys are two-faced in many cases, because often they are only nice to get in a girl's pants. They aren't genuinely nice.
Speaking of, as a side question, would Tom have turned on Grace had she put out at the end? Or would he have taken her side?