<human>: I'm really confused, and sad, but sort of numb. She has had these feelings for a while, but only opened up to me a couple of weeks ago. 

We are sleeping in separate rooms, but trying to live together, as there isn't another option financially. I'm trying my best not to fight, although tensions are very high. When we are getting along, things seem to be back to normal, but with a hint of numbness and coldness. 

I am so confused, this seemed to come out of nowhere, but I can see retrospectively that this has been a slow, and long progression. 

Her main premise behind her feelings is that she doesn't feel like an accomplished person, or a complete person, and she wants to live alone and find herself. It got really bad a few weeks ago (and I don't understand why), and she said she had for the first time wished herself to be dead. 

I'm torn apart, I want to save this marriage. But, I'm constantly paranoid because for the past 6 months or so has spent quite a bit of time with her male co-worker/friend. One night she stayed out until 4AM with him, and "nothing happened." I felt I wanted an apology, but she didn't think she did anything wrong. That was a major shift in our relationship, and the arguments have escalated since then. And my paranoia is getting the better of me. 

Thanks for reading.

Can you give me a shortened version of the text?
<bot>: Relationship of 10 years is spiralling out of my control and it got to the point my wife said she wants to be alone to find herself, and is very depressed about who she is, but I don't understand.