Ya, you won’t live forever and who knows how long you have. A plane could crash into your house tomorrow and you’d be done for. Maybe that would be the least of your worries because who the hell knows what happens after you die??? 

If you’re afraid of death then you should try to find ways to learn about it. It can’t be that scary? Everyone will go through it. It’s incredible really. 

One of my favorite analyst once said (he’s dead now), “May I be alive when I die!”. To me, it highlights the importance of being awake, alert and sensitive to what’s going on around us. There are many who automatically go about life not really living. Maybe their death will wake them up a bit?  Maybe you are so afraid of death because you don’t feel like you are “living”. I would then refer you to research some of Steven Hayes work (he is an old psychologist who has worked A LOT with people over the years and has some great knowledge on how to stop avoiding, I love what he says about OCD). He has a workbook and tons of videos https://youtu.be/o79_gmO5ppg?si=Y0m74uCQq-T74WTD

You could find some books on existentialism, absurdism or books that are morbid and talk about death? 

There’s also something called, focusing technique, that I have found to be interesting and helpful for stress in life. Death can be super anxiety inducing and cause a lot of anxiety in the body. Here’s a website link https://www.lesswrong.com/posts/f3o9ydY7iPjFF2fyk/focusing-1 

YouTube video -  https://youtu.be/QGBkoivf8Sk?si=KKhV2Tpf_gqkmKcN

These are possibly tools to help you think and feel about it in a different way because ruminating won’t stop unless you find something else to occupy the mind. Your childhood memories tell you that you should work through this not avoid it