I get the impression, at times, that you want your husband to move at your pace.. and right now, he can't. That doesn't mean that at some point in the future you won't meet in the middle, but I think you need to slow down a little.
You had a great conversation, after which you said you felt like you understood where he was at, and it made you feel better.. but then you emailed and now you feel confused again. Maybe you should have stopped for a while after the conversation.. ? It might give each of you some breathing room..
Also, in your conversation, you say you don't feel you have the grounds to ask him to wear his ring, but in the email you ask him not to see anyone. That seems a little contradictory to me. (Obviously, in a *normal* world, you wouldn't even have to voice these things, but...)
Although I think you are within your rights as a wife to expect these things, I feel like making these requests could push him away again.. and he seems to be making steps to come closer. I'm just not sure that it does you any good to ask him outright.
I'm not sure if I am articulating myself very clearly, but I hope you get what I am saying..