Fiancée ended longterm relationship suddenly

Hello,

This weekend my fiancée made the decision to end our almost 10 year relationship out of the blue.

She thought she was making me miserable (she wasn't) and she was unhappy that we had started to argue more.

She had come to learn a few months ago through work that she has and avoidant attachment style which she mkept to herself, I have misunderstood this for her sometimes being disinterested or seeming to not care aboht certain things. She has never been overly affectionate but things took a turn a week away where she became distant seemingly out of nowhere

I was only made aware of this over the last week , if i'd have known i would have tried to be less pushy with my feelings as at least i would have been aware of how she was feeling. As she struggles with talking about that.

I am absolutely devastated, i think we could have worked around these issues now we are both aware of them l,but she seems to have given up. I don't want to give up on this until she tells me it's useless but i don't want to push. She still wants me in her life and is still currently living with me, but she seems to be in a far worse place now than she ever was before. She went to family over Christmas and said that she missed me and still loves me/is in love with me. I just don't know what to do for the best.

Does anyone have any experience being in a relationship with someone with and avoidant attachment style? She didn't mention anything about the breakup to family or friends until she couldn't avoid it anymore.

Any advice will be appreciated,thanks in advance!