Had a similar dream like that. But in my dream I think I died?

So like your dream, mine was hyper vivid too.

Met a girl, we dated, we got married, even had a couple of kids. And then at some point we celebrated our wedding anniversary with a big party. Our kids and grand kids were there. It was an amazing feast. And we go to bed happy, I kiss her good night and tell her how lucky I am, and then I startled myself awake and I find myself alone in bed in my darkened house.

I figured that she must have gotten up earlier or something, so I go to the bathroom, but I don’t recognise my face in the mirror initially, looks too young and I start to panic. Rush to kitchen, shouting her name. But the kitchen is empty too, obviously. She was never real. I mourned that loss for a few days, it really messed me up for a while. Wanting to go back to the dream. But I never saw her again in my dreams.

Scumbag brain.