If you're looking for a meeting place or a good stop around ½ or halfway between Fort Wayne and Wabash, you can try Mardenis, IN, which is about half an hour southwest of Fort Wayne, or about half an hour east of Wabash.
Another possible place to stop near the midpoint is Bowerstown.
About ¼ or a fourth of the way, you can stop at Liberty Hills, IN. This is about 14 minutes southwest of Fort Wayne.
About ¾ or three fourths of the way, you can stop at Andrews, IN. This is almost an hour southwest of Fort Wayne, or about 16 minutes east of Wabash.
If you drive straight through without stopping at all, the total distance is 51 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 57 minutes.