Well I think that everyone thinks that there is an After Life
I don't. I think it would be nice, depending on which form, but I don't think one exists. Same thing goes for many others.
if you look at most big civilizations they had an afterlife in their religion.
People don't want to die.
This is because the Human mind can not think of an end to life
I can think of an end to life. It's called nothing.
so they think that we will live for ever.
No. You shouldn't think that you'll live forever if there's literally no reason to. Body stops working, person is dead. No evidence for further living. End of story.