An RJI is a Request for Judicial Intervention. It is a document that must be filed in order to have a judge assigned to a case. If there has been no further activity on your case, then there's nothing else to be done. You could contact the county clerk's office to see if anything else is in their file on your case.
Prosecutors will VERY rarely prosecute the crime of adultery although it is still technically a crime. Prosecutors have great discretion in what cases they prosecute and the prevailing attitude is that adultery is not worth prosecuting. Most DA's offices believe that adultery should be addressed by the parties.
You're correct that it is a crime but, if you are unable to get a divorce, I'd recommend simply trying to move on with your life.