Everything that we experience IS our reality. A fish in the tank dies a fish. A human on earth dies on earth. The temporary nature of all life is what makes it beautiful. Be happy for what you have. One day life will cease to exist in our small spec in space and no one  have even noticed. Time does not exist for those not alive, therefore if the last human takes its final breath, someday somewhere out there we will persist, likely not human but living. Maybe not intelligent but alive.  And there will be virtually no skip of a beat from when you died to when you re-emerge. This cycle happens constantly. I am you, you are me, we are they, they are we. We are one.