Most Helpful Girl
Most Helpful Guy
From my experience, it's a bit of both. The person who gets dumped will feel sad because they got dumped and probably wish they could've done more. The person doing the dumping will feel like crap for doing it but also may question if they did the right thing. However, sometimes neither regret it and it's not always how I described it. But, in my experience, it was always the dumper.