EB. I think I understand where you are. The way your W is treating you is similiar to the way W treated me. The difference is that there is no evidence of an OM in your sitch (which is a big difference).
I think you are handling it well. I think the only thing you can do is continue to GAL (like you are) and try not to pursue. However, I think it is important to be there when she needs you. These will come up from time to time. I know this is a very hard balance to mantain. Have patience, I think you are doing a good job.
About the ring, I would not take it off to make a point. For example, if she started wearing her's again, would you put yours back on? If the answer is yes, then I would say you should just keep wearing it. You don't want her to have that type of control over you. That is just my opinion.