At work, they're always talking about how teams should form a consensus on what to do, rather than simply going with a majority vote. In consensus, maybe not everyone gets exactly what they want, but everyone on the team is happy with the solution. While this may involve some compromising, if it's just a compromise and one side isn't really happy but is just giving in because they're the minority, it's still not consensus.
I think codependence is all about compromising and going with the majority vote, and if one person is "outvoted" more often than they feel is fair, it breeds discontent, and eventually something will snap.
I think a real relationship is about consensus, and everyone being happy with the end result. It might not be everyone's favorite solution, but it's one that everyone is happy with, and everyone is getting something they wanted/needed out of the end result, with no resentment.