Personally, I think 2 things: A, you're looking for the wrong kind of girl. Stay away from these materialistic type ones, and find ones who are more wholesome, they'll usually support the idea of being car-free. And B: don't bring up the whole car-free thing as a major point. When, and If, they ask you about the fact that you have a car or not, just say, 'oh, I don't drive." And then leave it. I find that if neede, buddies W/ cars, or even cabs, rentals, whatever, will work. Trust me, they're out there, you just have to look. My ex-girl loved the fact that I din't drive. We just took a cab if we were going out, or the train, or we walked. We also lived close to everything, so it makes it easier.