What is the meaning of life? You assign your own meaning, there really isn’t any mystery there. If you aren’t happy with what your life will end up meaning, only you can change that, and you don’t have limitless amounts of time to do that in. Get to it, Man!
Part of what’s so moving when someone commits to you for life is precisely that you know that this person doesn’t have eternity to lead their lives and they’re making you a priority. You can only do that if you understand that you have limited time.
This Life: Secular Faith and Spiritual Freedom by Martin Hägglund
I have no qualms about my own death and probable ending of existence in any form beyond not wanting my death to happen anytime soon. I do carry a fair portion of caution with me everywhere I go. However, the universe existed before I was born and it will continue to exist after I’m gone. The universe does not need me, and anyone who is bothered by that probably needs to be talking to a therapist.
The only thing that bothers me about passing from existence is dying without knowing why the universe exists at all. It is a question that is not likely ever to be answered. The universe is for all intents and purposes its own reason to exist. It is, just like I am.