Maintaning a strong relationship requires constant care and communication, and certain traits have been shown to be especially important for fostering healthy relationships. Each individual should, for starters, feel confident that their partner is willing to devote time and attention to the other. They must both also be committed to accommodating their differences, even as those change over time.

In the 21st century, good relationships are generally marked by emotional and physical fairness, particularly in the distribution of chores necessary to maintain a household. Partners in strong relationships also feel grateful for one another, openly provide and receive affection, and engage in honest discussions about sex.

In good relationships, partners try to afford their partner the benefit of the doubt, which creates a sense of being on the same team. This feeling, maintained over the long term, can help couples overcome the challenges they will inevitably face together.