Another thought .... be prepared for him to deny anything you have told his parents. They may believe his lies and think you have malicious intent. Make sure you have proof, so that he can't squirm out of his problems.
As I said above a few days ago, I was concerned about his parents reaction. They seemed to take it seriously, but I was worried that they wouldn't believe you (parents don't like to see the bad in their children especially if they don't see it). Sex addiction rarely affects parents, usually only the wife and children, so it is difficult for them to see anything. Take them the proof (keep copies for yourself) and tell them that if they ever see what you see then it's up to them to take action. All you can do now, is weather the separation and possible D, get on with your life, and hope that you are overreacting (but I doubt it).
As for the wedding ring .... depends how much it means to you. Wear it if you feel it is part of your wedding vows. I don't wear mine because I think my M is a farce and a lie. Strangely, my H wears his. Perhaps he thinks if he wears it, I'll believe him. Who knows! I wouldn't worry too much though ... it's the least of your concerns right now, and I think you may be placing too much emotion into a piece of jewelry.
Me:57 H:52 M:28 Got another lawyer last year and filed. D35,S/D twins28,D22 EA4/04 End? Who knows? "Life is like a mirror. Smile at it and it smiles back at you." — Peace Pilgrim