On Earth's timeline, which is 4.5 billion years, modern humans have only been around for 200,000 of those years. If Earth's timeline was a 24-hour clock, humans would only account for 1 minute and 17 seconds out of the 24 hours.
That goes to show you how irrelevant humans are. We mean absolutely nothing in this ever changing and ever expanding universe.
Not only do you mean nothing, but you're going to die as well. We will spend an infinite larger amount of time dead than our very short time we have alive on Earth. Humans aren't even special in dying, because everything in the universe eventually dies or ceases to be.
You're dying, Earth is dying, the sun is predicted to burn out in 5 billion years. We open our eyes for the first time just to one day close them forever.
Does nothing mean anything? Yes, it does. While it is true that nothing matters and everything is dying, the actual knowledge that nothing matters gets us absolutely nowhere. If you take a deep look at any individual we will see something. That thing is a reason for living. The feeling of love, being with family, sharing experiences with friends, having fun and doing what makes us happy is something that is so incredibly special. These fantastic things make life worth living, even with the knowledge that nothing has worth.
Having these experiences and feelings can save us from the scary truth. Billions upon billions of people everyday waste that priceless gift though. We worry about bills, we get stressed over the littlest things, and we kill each over politics, religion, and race, but they don't understand that none of that matters! In a couple of hundred years, there is a good chance that humans won't even exist.
If people keep living like this, then they are just ruining this fantastically weird, but amazing small window of life we get.
Nobody knows what happens when we die. We could go to heaven, we can be reincarnated, we can become ghosts for all we know. People are scared of the uncertainty of life, but that just makes life even more special. Not knowing what happens next should make us cherish this time even more and knowing that nothing matters should make us value the experiences we are able to somehow have in this infinite universe of pointlessness.
Don't worry about the small things. Don't worry about the major things. Don't worry at all. Nothing matters so why worry?
I will leave with a quote that everyone should live by.
"Nobody exist on purpose, nobody belongs anywhere, everybody's going to die. Come watch T.V."- "Rick and Morty"