Trevor sighed again. "I wish Zoe was the type of girl I wanted her to be."
He started up his car, then drove home. He briefly thought about picking up Zoe from along the street and at least give her a ride home. He was just a chivalrous kind of guy. But as he drove down the street, he didn't see her. Maybe she took a different route home? He didn't want to spend his evening looking around for her, thinking that she could just take care of herself. He wanted to put this date disaster far behind him.
So he just drove home.
Back at "Lovers' Hill", Trevor made a wish before leaving, but this wish didn't get granted. The wishing chain followed the same rules as the wishing stone, so his wish didn't get granted because it was in contradiction to a previous wish that was made, specifically the one that turned Zoe Merlin into a slut.
So Trevor still had another opportunity to make a wish that could be granted.