If you must drive and there is no alternative then drive. Just try not to drive when you don't need to, wheen yourself off the car addiction slowly, you will probably find your lifestyle improves when you reduce your hyper-mobililty.
If you are hyper mobile you probably don't have the time to meet or get to know your neighbours very well.
So try out a few local shops within cycling distance (under 6km) in your area that might need the trade more than the superstore with huge car park on a major junction. Change from one big weekly shop, to shopping at the local greengrocers every day for fresh food. Of course most community shops are closing now, because people prefer facless shopping with no interaction with other people, and seeing their money going out of the community to feed rich cats living in Jersey or Monaco.
As for costs, giving up your car will save you money! Actually a car costs you much more than public transport and your perceptions of the PT service are probably much worse than the reality.
The problem of course are the fixed costs of running a car, the AA estimates the average cost of running a medium sized car are 55p per mile when fixed costs of depreciation, insurance etc and parking, repairs and petrol are all taken into account.
You'd find that the buses are probably quite competitive when compared to the full costs of running a car, and as you get used to a car free lifestyle you will get to know the timetables and plan your trips to multi-task, the extra hour waiting for a return bus after a shopping trip you spend at a library, or having a coffee, art gallery or whatever your interest lies.
If you want to go carfree but still have access to a car for regular trips that you can't do any other way you can join a car club. These operate in most major cities but if there is not one operating close to you, you can get one going, get a group of 5 - 12 neighbours and buy a car which you share, each user logs how much they use it and you split all costs according to the amount you drive. (Ask your local council to find out details of car clubs in your area)
We are addicted to cars and as local community shops and services, post offices libraries close down replaced by one regional centre which is accessible only by car our car culture grows.
Pollution, road saftey, accessiblity for all, are all disreagarded in this march of madness. How is it better to lose community shops? How is it ok for kids, the poor, and the old to be almost unable to access essential services?
It is possible to reverse this trend and just swapping a few trips a week to sustainable modes helps.
Many people are living a car free life all over the country, including very rural areas. Try to get hold of the book Cutting your Car Use to learn how you can do it: if you live in Scotland you can get a free copy from:
www.fifedirect.org.uk/travelandtransport