Here's the definition of CEO from Wikipedia.

A chief executive officer (CEO) or chief executive is one of the highest-ranking corporate officers (executives) or administrators in charge of total management. An individual selected as president and CEO of a corporation, company, organization, or agency, reports to the board of directors.

By definition to be a CEO a couple of things have to be in place.  One, there has to be management present, or at the very least employees.  Two, there needs to be a formal organization.  Three, there has to be a board.  If you don't possess these characteristics don't call yourself CEO.  Be a founder.