I definitely believe in afterlife. The more I learn about God and His Word, the more He makes it sure in my heart that my life will not end after I die. His Spirit assures my spirit of this fact.
I find much comfort in it.
When the two thieves were on their crosses on either side of Jesus as He hung there, too, Jesus told the one who believed, "Today you will be with me in paradise."
I think within the heart of man is the knowledge that there is a life after this one that we see. We want there to be, but we are often afraid, if we are not sure of our salvation, of what kind of afterlife we might have.
When my oldest little girl was dying of cancer, I had the opportunity to work through this for myself, and with her. When she was about to die, she was ready. There was no fear for her, no doubt that she would just be gone. She knew she would see the Lord Jesus. The only thing that worried her was if we would be there soon.
I assured her we would. That the time would seem so short, and then we'd be there too.
I could say this because with God, there is no need for time as we know it.