There are different bar scenes in columbus as well as restaraunt scenes.
Go out, meet people, make friends.... do all of these things @ Bars, Resaraunts, Cigar shops, etc)
Other ideas (Blue Jackets Games, Clipppers games, concerts, theater presentations, Art exhibits (Columbus is huge on art). There are websites dedicated to events and nightlife in Columbus.
Get a copy of 614 magazine, a copy of columbusalive, and log onto eventful.com and look at Cbus.
Also, find the little "nichey" places. The downtown areas of Worthington and Westerville are great. Even some places in Polaris. Yuo would be surprised but there is a GREAT bar scene @ Easton. The no brainers are Arena District, Grandview, and the south Front area.
Mix it up, Go out, meet people.