10 miles is fine, you can have friends everywhere and you can’t expect everyone you know to live in the same urban sprawl.

Use public transport, take a cab if you need to or use a car club (shared vehicles use less resources than owning a car), ride a bike, walk the 10 miles. Infrastructure helps to reduce personal car use.

This isn't right. 10 miles is a fine distance. I met up with friends 13 miles away today. As long as there's good public transport it's not a big deal.