Dependent personality disorder (DPD) is an inability to be alone and its being over reliant on others for comfort and support. Unlike insecurity, which is common, there's a need for reassurance to function.

As per Cleveland Clini, those with this condition normally first shows signs during the early to mid adulthood.

Symptoms of DPD

Signs of this disorder include:

• behaving submissive

• For decision making relying upon family and friends

• repeated reassurance

• being easily at others disapproval

• feeling isolated and nervous while being alone

• fearing rejection

• being excessively sensitive to criticism

• a tendency to be naive

• fearing abandonment

Those with DPD will need constant reassurance and they become devastated when relationships and friendships get severed.

When alone, a person with DPD may experience:

• nervousness

• anxiety

• panic attacks

• fear

• hopelessness

Sources: https://www.healthline.com/health/dependent-personality-disorder#causes-and-symptoms