I am able to understand ur difficulties. Hearing voices when no one is around can be auditory hallucinations. They are seen in people having psychotic illness. Ur friends and family might not understand or accept what is going on with u. Don't worry, it's not ur fault. It usually occurs because of chemical disturbances in the brain. It can be treated with medications and counselling. U will be able to function better with it. U need a Psychiatrist evaluation. U can also consult me online through the Practo chat option. Best wishes for speedy recovery!!