If you're looking for a meeting place or a good stop around ½ or halfway between Fort Wayne and Coldwater, you can try Ashley, IN, which is about half an hour north of Fort Wayne, or about half an hour south of Coldwater.
About ¼ or a fourth of the way, you can stop at Auburn, IN. This is about 15 minutes north of Fort Wayne.
About ⅔ or two thirds of the way, you can stop at Angola, IN. This is about half an hour north of Fort Wayne, or about half an hour south of Coldwater.
About ¾ or three fourths of the way, you can stop at Valley Outlet Center, IN. This is almost an hour north of Fort Wayne, or about 15 minutes south of Coldwater.
If you drive straight through without stopping at all, the total distance is 60 miles. The distances shown above don't include local roads to get into each town, so if you're planning a long road trip, make sure you factor in traffic and road conditions, rest stop breaks, and interesting detours along the way. If you're in a rush, you can do the trip with zero stops, and your total travel time would be around 56 minutes.