Autophobia

Autophobia is a phobia (persistent and irrational fear) of being alone. The word is derived from the Greek words autos ("self") and phobos ("fear").

Many people who fear being alone fear being unloved, unwanted, or unrecognized. This fear often leads sufferers to enter into and remain in destructive social relationships. It can also lead them to engage in codependency and self-destructive behavior.