As awful as 2020 was, its ability to reveal the genuine strengths and weaknesses of our relationships was an unexpected boon. They enable us to discern fair-weather friends from friends tried and true. As an evolutionary psychologist, I have conducted research on social relationships and emotions for over 20 years. If I demonstrate that I value you, then, all else equal, it pays for you to value me in return. The pandemic has therefore been an unexpected (albeit unwanted) opportunity to test the tensile strength of our relationships.