If he'll go Retrouvaille might be a really good thing. W and I went two years ago. I think it could have made a difference, but she was 'busy' with school, and had absolutely no interest in following up. She knew the problems were all me, so she didn't see the point. Hopefully your H would be different.
I think the date or flirting might be too pressuring for him. You can come over to my thread though.......
Actually, if he'll go, Retrouvaille would help you communicate better to get him to start to interact more with you.