system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How/Why do we get attached to people in a short time period?

I was just curious as to why we as humans get attached to other humans in a short period of time. For example in dating we start to hinge our feelings and mood on whether a person, who never existed in our world before we started dating them, thinks about us. In simplest terms why does a girl you met at a bar not texting you back mess with your head and affect your mood?
gpt
For most of human history we did not have the luxury of taking your time for anything. Patience was not a virtue when you had only a few hours of daylight to get all the things needed to survive done.

This includes making relationships. The individual may die at any time, but you may need their help, so it's beneficial to the group that individuals quickly learn to operate together and trust one another.