Rejection can seem to be overwhelming and all-important because of pack-mentality behaviors that sustained our species long ago. EG...belonging to a pack/tribe/

Rejection can seem to be overwhelming and all-important because of pack-mentality behaviors that sustained our species long ago. EG...belonging to a pack/tribe/whatever increased your odds of survival against predators. Getting kicked out of the pack thousands of years ago was likely a death sentence. Old habits(and our mental/emotional reactions to them) die hard.