Answer: Depersonalization disorder
Explanation:
Depersonalization disorder, also called derealization disorder is a dissociative disorder which refers to the sense of feeling of disconnection an individual has from his or her thoughts or body and surroundings making them feel so unreal.
People with this disorder tend to always feel like they are outside thier body, without control of what to say or do with regards to thier emotions
Most people that have gone through a trauma such as being involved in an accident, or imprisonment find themselves with such disorder.
Boris feeling a sensation of constantly being attached from his surrounding, shows that he is probably suffering from Depersonalization disorder.