i think its a bit of a simplification to say that its, its nature's way of keeping us going, because actually er ro , the idea that romantic love is the start of a life long relationship that produces off spring is really quite recent, erm for, for most of history er marriage's were on the basis of continuing er lines, continuing property and people had to erm some how or other cope with living with ano another person that might not necessarily have been the person that they would of chosen from love and, and this is still true in many societies and situations now.