Well to answer both posts:

There wasn't a specific event that triggered her to want to break up, it has been going good then bad then good then bad. She has had a lot of stress this pat month at work.

I have noticed that she goes through spells of constant tiredness, for a month or 2, then everything is fine again. This has been going on for about a year. When she is 'normal' things are great we have fun together and enjoy each others company. But the smallest of things can trigger her and then the whole week is spoiled, she remains angry.

It is not me who want to move out, it was she who wanted to move out. I am willing to try and work on our relationship together, she said she does not want to she doesn't have the energy/willingness to work on it.

She is scared if we work on it, and it goes good for 2 months or a year and then this happens again, she said she is not willing to go through the pain again, and then in the same breath she would say, but I'm afraid if I leave you I will regret it...

I am extremely confused, I was angry but I am now calm but sad. We can talk about the feelings (or in her case the absence of feelings) calmly. Not angry anymore. But I am trapped in twilight/purgatory on our relationship.
The uncertainty is overwhelming...

I think the combination of the stress of organizing a marriage(and us paying for it) and elevated work stress in the past few months might have triggered it.

Thankyou for your support