Death is just a phase in this life, every living thing must die. That's something that can never change. You being afraid to die is almost the same as being afraid to live.
What's more important is how well you lived out your years. Did you live it out in a good or bad way? Did you live it out pleasing others or just yourself. How will you be remembered when you die is what you should really ask yourself.
Death will surely come, but before it comes live your life to the fullest in a good way you will be remembered.
Answering that second question goes to religion and to avoid any arguments, I will make it as short as possible. I personally believe in life after death. Where after death t there is judgement and if you lived your life in a way ward style, if you lived your life in a way that didn't please God then you will be condemned for eternity (HELL) but if it's the other way around then you will be let in into paradise (HEAVEN) .