I have a lot of feelings about the way they have gone about the situation at hand. I quit my job and we gave up our lease, and right before we move I get texts saying I'm not coming and now get the silent treatment.
Wow, that is so completely messed up this has happened to you, I don't even have words... Do you think you could get your job back? Was it a good job?
To answer your questions about not saying the wrong thing:
I've been separated for more than 2.5 months now, and have said plenty of wrong things. I know all about the wrong things to say I'm no dummy, LOL.
I suppose right now what's most important to you is that you're really looking to try and re-establish domestic tranquility and get on with the move that you've planned. I don't blame you. I would probably try to approach this the same way. Unfortunately, I think to do this in a fast manner, you will need to take on some more blame.
My advice is first when she attacks you for whatever hurtful thing you said or did within the past century, try to validate. For example, say, "Wow, you clearly feel really hurt about what I did. I can understand why now that you've explained it to me." Say this especially when you completely disagree with the logic behind what they are telling you.
Do not under any circumstances, try to JUSTIFY what you did to cause the hurt feelings, especially if you think she's off base. You will not be able to persuade her. Just forget about even trying.
Do not under any circumstances, try to ARGUE with her about her decision to leave you in the dust, or why what she is feeling is wrong. What she is feeling is 100% the truth, and accurate. Any other view point will be false. Argument is futile and will just go around in circles spanning into a million other mistakes or transgressions that you may or may not have undertaken.
Do not try to DEFEND yourself, for whatever action you made that hurt her. Just apologize. Please keep in mind that apologizing can be a double edge sword. Once you apologize you will have admitted fault. She may hang that mistake over your head the rest of your life. However, for the fastest resolution to an argument, and in this case IF you really want to make this move, you will have to admit defeat and apologize. I say IF, because you might want to use this time to do some soul searching to see if you really want to cut yourself off from the support network you have established in your current locale. Once you move somewhere else, you're on your own. You'll be very isolated, unless it's somewhere you lived before. I've found the validation from in person relationships to be really uplifting the past couple of months. So think long and hard about what all you are giving up for this woman, should you win her back. I wish I had done this more a year and nine months ago. My life would be very different, right now.
Finally, do not EXPLAIN your point of view. She will somehow manage to turn it upside down and you will be wrong, a terrible person and probably something worse, like an emotional abuser. Just accept that her point of view is the only one that matters. Once you accept this, you'll be able to eliminate some of your conflict. I mean let's be real, we all have our own opinions, so you're bound to slip up once in a while.
I've been meditating a lot where I repeat the mantra don't JADE (Justify, Argue, Defend, Explain). Not doing these things will eliminate the circular arguments. It may even win an apology back from her. This happened to me last week. It really works, but it is counterintuitive to any sort of reasonable human relationship where there is genuine give and take. In your case, you will give and she will take. Maybe after a while, she'll regulate and you'll receive something. When that happens, it will feel like cloud 9. It will probably be fleeting, though, from my experience.
To answer your question about bringing it up with your therapist. I made PDFs out of screen captures of some of our messed up text fights. I had one severe one, where you could literally read as she shifted the blame from herself to me. That was enough for my therapist to agree with my assessment. However, diagnosis will probably not be brought to her attention. You will have to be a very brave soul for that. More brave then me. The mere suggestion that she might need some help from a few years ago has caused so much strife in our relationship I can't even begin to explain it. I wish I could convince her to get help. I think this probably won't happen, though. She would have to admit to having a problem first. People with mood disorders, are unable to do this.
Good luck with whatever path life takes you on!