The communities of Galloway and Hilliard are probably the closest "suburbs" to Interstate 70, West of Columbus and still considered "Columbus". There are some who disagree, but I think too much further West (West Jefferson for example) and you're not really in Columbus.
Hilliard, Galloway, even Grove City would be great suggestions! I am a Realtor for Re/Max Town Center and would be happy to send you an email link to homes in those areas...perhaps let me know what your search criteria is as far as price, bedrooms, parking, etc.? Feel free to contact me at email@example.com!