Is There a Key to a Long-Term Relationship? In all truth, there is nobody who knows the one all-encompassing answer to this question if there even is one, nor is there one specific secret to a long-lasting relationship that covers all facets and will work regardless of the situation. However, there are many repeating themes, precepts and guidelines that the commitment to or the lack thereof will hold couples together in making a relationship last or gets them to split and become separated from each other. What then are the main areas of focus that determine the long-term success of any relationship, you may ask? Let's find out together.