>>86002 (OP)Humans are social animals. If you don't have enough people around you that you enjoy spending time with and trust, your "tribe", your mind makes you feel these feelings as its trying to encourage you to find others to bond with, for the reasons of safety in numbers o algo.
Unless you are mentally ill, you also have the natural urge to start a family. If you don't do so, you end up like those 40 year old soyjaks drinking soylent while filling their house with anime figurines and pretending that their "doggo" is an actual replacement for a child.