You may want to file an action for unlawful detainer pursuant to chapter 82 of the Florida Statutes.
This communication is for informational purposes only and does not constitute legal advice and does not establish an attorney-client relationship.
Ask him to leave. Offer him money to leave, or file an unlawful detainer action.
The contents of this answer should be considered friendly advice, not legal advice and the answer should not be construed to constitute an attorney-client relationship.