What should i do about my split personality?

Psychotherapy: Not sure what you mean by "split personality" as it is used in different contexts. Contact a mental health professional for a consultation so you can obtain clarity about your condition. Best.

DID: The technical term refers to dissociative identity disorder (DID). Individuals with this disorder use dissociation as a defense mechanism against stressors, trauma, or other negative events. The presentation is multiple personalities that are suited to handle different stressors/traumas. For more info: http://www.webmd.com/mental-health/dissociative-identity-disorder-multiple-personality-disorder