attachment disorder

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A behavioral disorder caused by the lack of an emotionally secure attachment to a caregiver in the first two years of life, characterized by an inability to form healthy relationships and often by poor impulse control, chronic anger, and antisocial tendencies.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun psychology A condition where a person, especially a child, has difficulty, or is incapable of, bonding with others.