This score describes how desirable of a partner you are. Your worth as a partner will lead your relationships quality, with a time delay. If your worth rises over time, your relationships quality will as well. And if your worth drops, well... you get the idea, right?
This score assesses the quality of your relationships. It is simply a reflection of your worth as a partner, as per universal laws described above. It will lag your worth as a partner, both on the upside and on the downside. So if your worth has deteriorated, it will take some time for your relationships to follow suit. And when your worth has been rising, it will also take time for your relationship to follow.