<human>: Can you condense the text into three sentences or less?

After meeting in University and being together for five years, my girlfriend suddenly "disconnected" and then told me that she needs space. She says that she has just been thinking about things and she doesn't know whether we can make this work. Although we haven't officially "broken up" yet, she is now moving out for at least two months. 

This has all been a punch in the gut for me, as we have been happy together for so long and never fought. We have been through a lot together, and we have supported each other through very difficult life circumstances in the past. Although I had realized that the last couple of months had been stressful for both of us, and knew that we needed to both put more focus on upkeeping the relationship during the last few months, I never ever expected that we couldn't survive it.

In the past she had constantly told me that she wanted to marry me and that she knew I was "the one" within a few months of knowing me, so this is a big change.

She says that she feels that something has been lost in the last couple of months, and that it wouldn't have happened if this were "true love." 

Now that we have talked it out, I am left with a feeling of emptiness, sadness, and a little confusion. I understand that people don't always know why they feel the way they do, and that is okay. But it is still hard to understand how things could flip so quickly, with such little communication, in a relationship that was so good for so many years. How could she not want to mutually work on it together, at least for a short period of time?
   
I am not sure what exactly to think or do. I have told her that I want to stay with her, telling her fully how I feel about her, but I am also hurt by this to a point where I don't know if I could see her in the same way ever again even if she wanted to make it work. I guess some general advice and input would be helpful. Thanks.
<bot>: Girlfriend of 5 years "needs space" and is moving out. Looking for input and advice on how to think about this.