Forever implies endless.
Nothing before. Nothing after.
Why then are we concerned about the length of time we have here?
Why are we worried about leaving? Why are we worried about how long it will last?
If we look at it purely from our own perspective, then we do live forever.
Do you remember anything bad from before you were born? Do you remember any discomfort or difficulties?
It will be the same after you die.
There is nothing bad in it.
We aren’t aware of what came before we were born. Nor will we be aware of what happens after we die.
All we have is the current time.
This is our life. This is our forever.