Blind Sided - Need Support

I have been with a woman whom with every cell in my body, I know she a narcissist, she also has a 3yr old son. Background, she is an only child, when asked what she thinks people are for, they are there to please and serve her, world revolves around her, always pitiful me, no accountability for anything. She sought me out during her marriage (of 1 year) and had left her husband 2x and come back to me each time ( I am a woman too). We've been on this roller coaster ride for the last 2 years. I did see her divorce papers this last time she came back, they just need to be signed. Supposedly they had been, last Thursday I received an alarming text message from her stating she just got off the phone with the ex-husband and he knows everything about us having been together, the next text was that she felt we were not on the same page on our relationship and that she wanted to end it. Before I woke up the next day, I called her, she started talking about what he was saying, I stopped her and wanted to know about us and her ending the relationship. She said she doesn't want to see me anymore and that to give her things to a mutual friend. Before I woke up the next morning she had unfriended me from facebook.The mutual friend did not want to get in the middle. I told her that her items were at the house for her to pick up. I maintained no contact through the weekend, till today. I sent a text stating I was here if she wanted to talk about last Thursday, that I care about her and her son and am concerned. Her reply was, I don't want you, stop contacting me. I had only contacted her twice in the past 4 days, once about her items and the other reaching out to talk. It's hard for me to grasp why she is being so mean, to dramatic, so sudden with it all. The previous times she left she wanted to be friends but I could not if her objective was to reconcile with her husband. This was so fast, so unemotional and hurtful, what have I done to deserve such harshness. I am really crushed, struggling and my head is still swimming trying to make any sense of it all. She won't talk to me.