Terry, there is no way to answer those questions today. Yeah, she's mixed up right now, and you're in depression, but where will you and her be a few months from now?
My advice is give it some time. Don't worry about the long term answers right now, just focus on you and D today. Let some time go by before you decide to give up on your wife. There really is no good reason to rush this.
M: A really long time. Crisis: 5 years. She's still worth it.
Life is never made unbearable by circumstances, but only by lack of meaning and purpose. -Viktor Frankl