I'm a middle aged woman, but cannot stand the idea of my parents dying

[AskingInInterest]

I feel terrible writing this as I know how lucky I am that both my parents are still alive at 70. Hope it doesn't upset anyone.

I'm finding it excruciatingly hard to watch my mum and dad age recently, and feel so bereft about them dying soonish that it's really interfering with life (e.g. being awake now!).
I have my own family, job, social circle etc.
But I feel like I still need them so much emotionally that I won't cope when they die.
They're not in great shape emotionally themselves as my sister died recently, and I think this has something to do with how I'm feeling.
Does anyone else feel the same? I just find the idea of life without them unbearable. How does anyone cope with this? I know if we're lucky we all have to, but how?
TIA, and I'm really sorry to all those who have lost parents already.

Thank you all for getting it, and for being so kind. I feel very moved by you all taking the time to post your support and own experiences.

I'm very sorry for everyone else's losses - sounds trite, I know, grouped together like that, but I can really feel the pain in lots of these posts.

It's made me cry (in a good way - I rarely feel able to) to hear you say it's normal to fear death of others after someone you love dies. Sometimes the general feeling of loss in the world is overwhelming and feels unbearable. Yet somehow we must collectively bear it.
I managed to fall asleep again after posting and sharing this - thank you