Oh yeah, starting off strong.
When I try to conceive of a never-ending afterlife, it makes sense at all. We are finite beings, both spatially and temporally. As we evolved and developed a memory and consciousness, It seems to me that we would naturally incorporate any feature that would promote survival. Hence, a fear of death, a trait shared by other animals. With our greatly developed capacity to envision concepts outside of reality, some of us “solved” the innate fear of death by creating an afterlife. Not all religions hold this concept. For me, the only thing scarier than dying would be living forever!
The only thing that comes after life is death... So your question is actually, how do you deal with death... Buy life insurance...
I have never believed in god or an afterlife. This is normality for me....so nothing to cope with. Just enjoy this one life you have every day as much as you can. Reach out to others and show as much love to them as you can, taking pleasure in their company and in the wonders of the countryside and nature. You are young, I note, so my advice is just to not worry about what happens at the end, but get on with living the best life you can, you have it all stretching out before you.
It's easy to cope with something I don't believe in - live the life I have as best I can.
"I'll tell you a secret, something they don't teach you in your temple. The gods envy us. They envy us because we're mortal, because any moment might be our last. Everything is more beautiful because we're doomed." Brad Pitt in the movie Troy.
It is not something that will change, something that anyone can change, I do not say there is or that there is not, I hardly bother to think about it, because, it is a waste of time. If you spend you time worrying about it, it profits you not at all.
It doesn't bother me in the least. You live, and then you die. And after you die, you don't know that you're dead, so there's nothing to worry about.
I live the best life I can while I’m here. It’s all I know for sure that I have.