I also don't think it was a backslide. It's not like you've been pursuing him constantly and trying to have R talks. You've given him a lot of space over the last few months. You felt comfortable enough to bring up R talk at this time. There is nothing wrong with that. Try not to bring it up again for some time. I think you and I are at about the same stage in our sitch (although in my case there's still some contact with OW). I can feel my H wanting to come back to the M but some things are still holding him back, mostly his own issues (like your H). My H has also told me he's very much afraid of hurting me and doesn't want to hurt me again. It may be the same with your H. I certainly understand how frustrating it is but try to be patient.
Me47 H46 S13 M16 Piecing since May/09
"Life is 10% what happens to us and 90% how we react to it." Lou Holtz