<human>: I will start by saying I am an extremely emotional person and do not have the ability to "flip a switch."

That said... My fiance, who I believed to be my person, and I had a heated argument last Thursday and she broke up with me. We have lived together since January and formed a united front to raise her daughters together. She would always tell me I was her soul mate and how much she loved me. I haven't been the most pleasant for the past couple of months as a result of a tragic past that haunts me every year around this time. I never communicated this to her, and for that I will probably never forgive myself. In the last week she has been ice cold, showing total indifference. As a result I have panicked and engaged my abandonment defenses. I have said some terrible things to her...Also inexcusable. The more I panicked, the more cold she got. There was a hint of possibly working things out but it was never communicated to me so I continued to hurt and lash out. The very next day, she was found by a friend of mine on OKC: open to new friends, short-term dating, and long-term dating. When I brought it up, she stated she was just looking for people to talk to. Needless to say, things have gotten progressively worse and she has completely shut me out. 

I guess what I'm getting at is... How do all of you cope with having something so meaningful and suddenly being treated as an insignificant business transaction? I am not allowed to talk about my hurt or anything regarding our relationship with her and she has gone to stay elsewhere while I figure out a new living situation.

How do you cope when you feel like you've lost your one... And your one acts like you were someone they simply dated that didn't work out?

I am not coping well at all.

Can you condense the text into three sentences or less?
<bot>: girlfriend told me I was her everything and we were soul mates. Now she has moved on and I am stuck in hell.