My fiance left!!!

Hi.

Much to my anguish my fiance left and is living in another town.
The background: I am 33 she is 26. We've been together for 3 years. I know that this doesn't sound like all that long compared to a lot of the other posts I read on here, but it has been an extremely important 3 years of my life. I am in the medical profession. She is a jack-of-all-trades. We moved from an urban area (where her family resides) to a rural small town on the opposite side of the country. (escape rat-race, love of nature) I am working at a hospital here and the work is good and the town and surroundings are beautiful. We been have been living here for 18 months. She has been frustrated about not having a job (small town jobs are scarce) and bored being at home. I come home after a long day at work, she's excited to see me and I half would brush her off and just want to sit quietly for a while and read and relax.
In July she had a temporary job offer in a town 2 hours away. We discussed it. Agreed. She'd come home on weekends. The job was only for 3 months. We'd survive.

6 weeks ago the job offer was extended for another month. I expressed that she can go for it if she wishes but I hope that it doesn't become a permanent thing. As you can well imagine, permanently living apart, except for weekends is not an ideal arrangement (but I guess neither is her sitting at home without a job)

3 weeks ago we had an arguement about a clash of her year-end work function weekend away vs a weekend that I had planned and paid for us many months ago. Neither of us backed down. 2 and a half weeks ago we argued again and this time she was stone faced and said that I'm jealous of her work happiness and she doesn't want to be miserable here with me anymore. She said that she doesn't think that she is in love with me anymore.

During the last 18 months I (and she) have been under tremendous stress: moving home, my father passing away (a major source of sadness for me) my beloved dog disappeared and half of my life's savings was lost in what turned out to be a ponzi scheme.
My fiance told me that over the last year I have been unloving and I am not happy in myself and she feels that she can't make me happy.
She has given the engagement ring back to me. She is continuing working in the job in the othertown "for as long as the contract lasts" and has given us a month separation. I must also see a therapist in the meantime she told me. This I have already done 2 sessions of IC. She is not interested in going herself.
I know that I can be grumpy,bitter and irritable sometimes. Actuallly far too often and this is one of the major issues that she highlighted for me. I am really trying to work on these things. I have always been a bit this way inclined and after the death of my dear father I became even more sad to be around at home.
I don't wish to paint such a bleak picture as I'm sure that you readers are gettig at this time. We go away on so very many weekends hiking, scuba diving, camping etc. We love this and we are both in our element when we do this stuff.

The group that she is working with is mainly in their early twenties and seem pretty fun loving (read drinking and partying). The others are all been through recent divorces. I don't know if the ex-married folk have been telling her things like, "If it's like this now, it'll only get worse later..." and those kind of gloomy statements. I also know that she is younger than i am and needs some of that 'early twenties' party vibe. I did that in my student years (a lot ;-) ) and am mostly over that stuff.

We communicate by means of texting. I text her how my day was and that I miss her and love her. She texts me back sometimes. And no emotion or warmth in the texts from her side. Just one short straightforward reply sentence each time.
We decided on no phonecalls at the time of agreeing on the one month separation.

She came around on this past weekend to get the rest of her clothes and jewellery. We did kiss and hug quite a bit (all from my inititiation though) but I made a point of keeping the conversation light and not go into the "relationship status" as I don't wish every contact between us to be gut-wrenching and push her away and make her avoid contact with me.

I love her dearly. She is a genuine, kind and soft-hearted person.Very physically attractive. We have had such awesome times together and I honestly didn't even suspect that there was any deep lying distance or resentment going on about me or the job/home situation. At least not to the extent to have to leave home and call off engagement.
I have been good to her in our relationship. She had not lived or experienced much in the world and we've travelled a lot together and she has grown in confidence so much over the last 3 years. But I have also been irritable and critical. And I uprooted her from her hometown to join me on my crazy permanent adventure to the other side of the country.

Her social media status updates are all to do with broken hearts. (even tonight). Texting the way we're doing it is not working i don't think. All warm and fuzzy from me. Stone cold from her. And we can't see each other for the month (or longer) so she can't see that I am working so hard on addressing the issues of my moods, doing my IC, etc.

A lot of folk on here swear by doing the 180, but I have doubts that it will be effective on her. I genuinely feel, from knowing her, that she will just think that I've moved on and not attended to the issues.
But on the other hand, a beautiful letter I wrote to her admitting my errors and identifying where things need to improve and explaining the depth of my feelings for her was met with hardly an acknowledgement of receipt.

I am 99,9% certain of no EA or PA.
She's harldy even contacting her mother who she normally talks to very regularly on the phone.
There seems to be so much turmoil inside her. Like a midlife crisis. But at 26.

A lot of her possessions are with me at "our" house. Including her beautiful but enormous dog. She is not even asking about how he is doing. I don't know if she is so muddled in her mind at the moment that she's forgetting to ask how he is, or just trying to limit contact with me.

I don't know what to do next.
What am I doing wrong? Where can I go from here? Feel free to ask questions for more details. (I can't really put everything in one post)

I appreciate input.
JoeyDreams