I don't know what to do.

We've been to the Dr. She is on meds, trust me, they do help some. Of course she feels like she's leveled out and will quit taking them. That always leads to the spiral down turn.
I've tried talking to her till I'm blue in the face. Had a little sit down this morning in fact. She always tries to find a way to set blame on me. I keep telling her, there is no blame to be assigned, just be aware of what your doing or importantly, saying.
She is notorious for insulting people or saying something inappropriate. She sees no harm in that whatsoever.
I've thought real hard about taking some time out and just going away for a bit. Now I'll get accused of cheating. She thinks I'm driving up to Cleveland Oh, and messing around. She also thinks I'm doing this on my lunch break. I live and work in Cincinnati. Look at a map, that aint happening on a 30 lunch break. I don't really want to go to the P/O's EAP program they have. I don't know what you guys know about the PO, but they are truly assholes to work for. The less they know, the better off I am. My jumping out of airplanes is long over. The 20 yr old me had no respect for the 40 yr old me.
Fortunately, she doesn't drink. If she did that, I don't think I could have dealt with it. I grew up with an alcoholic, I refuse to live with that again. That was the single biggest reason I joined the Army.
We don't argue, mostly because I refuse to. I'll walk away and leave her to sit by herself. I keep telling myself, it's the disease, not her.
I do appreciate having this as a sounding board. Thanks guys.