Why won't she tell how she feels? 5 weeks of no response..

Hi, thanks for reading this in advance...

So I have been with my partner for nearly 4 years and we got engaged in April. She quit the job she hated to start her own business and we bought a house together and moved to a city she used to live in, which is closer to both our families.
I work on a boat for 5 weeks at a time with 5 weeks home in between so can live anywhere. I struggle with my own friend and time for me and my partner issues - I give her all my time really and so far she has given back to meet my needs perfectly.

We moved in to the new house a week before I had to go to work, she had 6 weeks (I had a course) to get settled in the house, continue the jewellery business she had already started, get back with old friends and make new ones.
I didn't notice then that I was not getting as many email replies or being able to catch her on the phone so much, I was happy she was finally not tired
from her crap job (boss was an arse) and being happy and active doing lots of climbing - why we choose to move there, and she had been seriously ill two years before and had taken a year to recover.

Ok so something had to be stressful - arranging the wedding had been one sided due to my work, but she was so keen to plan and organise. We also had a holiday after my course and then just 2 weeks together in the new house with new life style, her working at home. It was great, love the new people, place + with family easily visiting. It wasn't all amazing, we bickered a bit about usual couple stuff but the point is just before I came away again I thought I'd address an ongoing issue, that we struggle to talk as she just doesn't address things or bring stuff up.

On the back of her responding properly to my question (I was happily surprised to not have it diverted) the end result was she felt she didn't fancy me like she should anymore.... now that was out the blue (wedding postponed also), I can see hints that we had stuff to work on but she had said nothing, not even tried (I am pretty ok about talking about stuff - you may have guessed by now?)
But from that moment on the next 3 days she didn't address this, avoiding any physical stuff in front of our new friends, not wanting to talk about it... she said she just needed this 5 weeks of me away like normal, we would treat it like a normal trip and sort it all out when I got back. We had a walks in the day time discussing things which felt so good that we were addressing little things that we both agreed on. But she didn't bring much to the table or answer/reassure me regarding the big picture of us and her starting be strange behaviour. But having the 5 weeks like normal made sense, this was hurting me but she needed it. I offered to skip work so we could have some proper time together, settle in better and work on our issues, I mean then we'd have 10weeks to take it slow and relaxed.

Any way she insisted I went to work, I agreed to give her this 5 weeks where she agreed to keep like normal on the phone and messenger and we would still kept the chats we had started going via email for the 5 weeks.

But from the moment I left I stopped getting a good night message (after years of it), when I tried to call her I couldn't get her or it was drawn short (i always had to end them before due to work)... but mostly she couldn't say she loved me at the end of a call or answer any emails I sent bar the first one just briefly. so I am hurting so bad not getting much from her I had to stop calling and messaging her as it was messing me and up on twitter and Facebook she is carrying on as normal...

Since then, I asked her to email on Mondays so I know she is alive.... and that's all I get while I go nuts in my head with question after question. my friends and family are being supportive, but I just keep swinging from worst case to best case scenarios and can't understand the silence.
I have made it pretty clear I think that if I am to be of any use sorting our relationship out I just need a hint of which way she is going... but nothing. I refuse to believe she wants to drive me over the edge but also that she can't see she is doing it. if she had asked me to stop email and calling then fine, she doesn't even have to say why but she hasn't, she said keep
emailing as it helps for her to know how I feel... but it kills me to not get a reply to any of my questions or for her to share how she feels so I cut it off.
Does anyone struggle to tell a loved one anything? I just want to understand what's going on in her head...

Wow, sorry that was a mega waffle... thanks for making it to the end.
I actually have 2 weeks left before the boat I am on reaches land again, yay!
I feel lost, that when I get back I will have no friends, no partner, no purpose... I think that is just boat madness. From previous Experiance she likes to avoid stuff as it generally goes away, I just hope she doesn't want me to just go away... but if she does I would like to know now, 5 weeks may sound like a lot of free time but when everyone else works during the day, have there own family most evenings, trying to fit a social life and sorting out general life bits of 10 weeks into that time is tough.

Ok well that helped a lot just to get it all down in one go.... again if you made it to the bottom good effort! but it's much clearer to me where I am... but not where my partner is.
I guess it's just a situation where I need to wait but where waiting is sooo hard, brings everything in to doubt, myself and how I feel
about myself and my worth... right now I feel good but yesterday I could nearly do my job. I know if it were the other way round I would answer her