There's an occasional poster on here, Scoobysnax, who fits a similar description and used to annoy a few with his proJW postings. I have a good friend that's gay, though not dfed but remains a believer and attends the memorial. We've had many a heated discussion but I've come to accept that I can't change his mind, and even though I percieve it as making him unhappy, it's his life. He has a very sentimental view of his life as a JW.
You can point your new friend in the direction of help, but you can't make him accept it. I doubt he'd be that open to reading CoC but I could be wrong - the inactive but believing people I know remain defensive.