And yes, doctors have diagnosed, treated, mis-diagnosed, used a huge variety of medications and treatments. End result: Chronic pain and altered personality due to the medications. I am not blaming that at all on our situation, but it does play a part as it has totally changed our lives.
Well we do say not to look for answers because there usually aren't any, but having read along in your sitch I honestly feel her med's have played a large part in why you are here. That makes things particularly difficult for you because she's still on the med's, and if it really is because of the med's then there's not any changed behavior on your part that's really going to make much of a difference. Not only is she rejecting you but she's not seeking out love elsewhere, which sounds like she has just lost the ability to love (which the medical community is just starting to learn is a side effect of many medications intended to treat mood/ personality disorders).
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No idea what to do, so I am just going to continue to DB, GAL and do my thing.
Really, what else can I do?
That's really the best you can do. I admire you for sticking with it, you have a lot of inner strength.