Are my nightmares part of survivor's guilt?

Next month it'll be 7 years since losing my fiance to an accident. Our car got pushed on an edge by a reckless van driver (I got injured in the process), I was right there, tried holding on to her as hard as I could but still couldn't save her from slipping from my grip and falling into the ditch, into the river.

I couldn't even look at her parents in the eyes. They lost their precious daughter and only child. I failed them in the worst manner possible. Once in a while I still have the same nightmares. It's the same dream where I can save her but then she falls. I keep thinking maybe I couldn't hold elsewhere that would've made her not slip or do something else. Or why couldn't it be me instead of her.

Are these nightmares part of my guilt? They won't stop.

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2 mo
I hate myself that I couldn't save her. I couldn't do the one thing right.
Updates
2 mo
I hate myself because I was there. I had the chance to save her and I couldn't.
Are my nightmares part of survivor's guilt?
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