What is the best decolonization model for the United States to follow to free its largest colony: Puerto Rico?

well if u look back in history every single decolonization of a country cause a extreme revolution usually left wing socialist with exception of America became democratic. Because PUERTO RICO government are so dependents in the US bureaucrat if we give them independence now there will be a civil war and we had to coming restore the country again so best way is to join PUERTO RICO and other territory as new lesser state to union thus it USA not need to separated.