When you die, you will not exist as you do now, or at least that is the best guess.

There was another time that this was true.

Before you were born.

So, if you hold no bad memories of that time, why fear death? Certainly, avoid it if you can, because life is a rather interesting thing. You'll feel fear anyway because it's hardwired into your brain. But at least know there's no other reason to.

Unless you've angered the Great Cosmic Star Goat, and are fated for Eternal Bile, of course.