i'm trying to stay positive and enjoying the time. It's not as easy as many think.
While it was tough I'm doing all i can and had the mentality of failure not being an option.
It's just tough...really freaking tough.
So that's really all you can do. I'm going through the same thing right now (although I'm only moving 100 miles instead of 2000+). In the last 6 months I've seen my wife for 7 days, and 5 of them were depressing as fuck.
The last two days she was here (Mon and Tue actually), I just kept telling myself to make sure we both had a good time. It sounds silly, but you can't let yourself be mad at her for doing what she wants to do in life. If you can support her in that effort and still be able to do what you need, then just do it.
What I do, and it's silly, but it's been working for me, is anytime we're talking on the phone and I realize I'm about to be a dick, I just say 'Hey I got some stuff I got to take care of, but I love you a bunch and I'll talk to you later.', and then I go find my happy place. For me it's watching Doctor Who, since that was one of our old routines. For some reason, reliving those past memories, even alone, helps put me in better spirits for the next time I talk to her.
I may just be a softy, but when she's here no matter how desperate I am for it, I don't push the issue of sex. I try and do the things I know she enjoys (touching on her ears and neck), and eventually we kinda fall back into the old groove, and it's awesome. It's taken a few practice runs, but I think I've gotten the art down.
It's gonna be awkward living together again, and getting used to living in a new place, but I think you'll eventually settle in. Find those things both of you like to do, remember what it was that you married her for in the first place. After that, all the crap just falls away. Don't get me wrong, it still sucks, but at least when you get back to that point, you'll come home and the shit from work will slowly fall away. I can give you my example in that we watch Star Trek and Doctor Who, or play video games, and jab at each other's ability. Those kind of moments are how we bonded when she hated me, and it's how we sync back up after being apart for so long.
Biggest thing is, and I had to learn this the hard way. Don't bring up negative shit while you're angry, and in a yelling mood (dont know if you're that kinda guy, but i know i am). It's ok to be pissed off, but get the anger out of it before you bring up shit, especially stuff she hasn't done since you moved. After being apart for so long, it's a real quick way to drive a wedge between you.
Good luck man, and if you want to talk to someone going through something similar, I'm usually around.