4) I need to re-read DR. If nothing else, read chapter 11 - Dealing with the Depressed Spouse. If mine is not depressed, she is certainly very down. She wasn't 4 months ago, maybe not until x-mas, but she is now.
The depression part is tough - My W has been suffering from major depression for at least the last six months; probably much longer.
Is your W on anti-depressants? Mine is, but it's like spitting in the ocean. Doesn't seem to be really helping her as much as either of us would like it to.