I'm afraid that afterlife really exists

Religions promise us eternal life. They claim we are immortals spirits that will exist forever. I don't know if this is true because I can't prove it or disprove it in any way. But let's hypothetically say afterlife is real.

The idea of being immortal scares me. You are forced to live for hundreds, thousands, milions, bilions, trillions of years and It never ends. What will we do for such a long time? How can you possibly make eternal life exciting? In the end even the most patience soul would become bored to 'death'.

I hope that existence ends at some point or at least you have a choice to be ereased from the Universe. I don't want to exist forever. Existence becomes a prison if you can't die. You can't escape it. Immortality sounds like punishment.

At some point I just want to stop seeing, hearing, thinking. I want everything to be like a dream without dreams. I want my consciousness to stop working. I want to turn into nothingness.