Welcome Ewige Jude. I'd bet quite a few people here would be more than willing to be "in your shoes". Because for them immortality is full of hope and promise, not in any way a form of retribution.
Aren't you immortalists afraid of ever missing out on Heaven etc?
What we're told of Heaven isn't that appealing actually. It probably was, a few millenia upto a few centuries ago. It was shaped to meet people's expectations of an ecstatic, paradisiacal life back then. For instance, a similar case would be :
Cockaigne or Cockayne (pronounced /kɒˈkeɪn/) is a mythical medieval land of plenty, where all the harshness of medieval peasant life does not exist."the houses were made of barley sugar and cakes, the streets were paved with pastry, and the shops supplied goods for nothing."
"roasted pigs wander about with knives in their backs to make carving easy, where grilled geese fly directly into one's mouth, where cooked fish jump out of the water and land at one's feet."
See, I'm not tempted to eat pastry that people would walk upon, and the idea of having roasted undead animals with pieces of cutlery protruding from their corpses, wandering around, frankly freaks me.
Early visions of Heaven, such as New Jerusalem, or the Garden of Eden, are just as out of date nowadays, they don't meet people's expectations anymore. Yet we can't ditch and replace them with modernized versions of Heaven altogether. The result is a growing discrepancy. Heaven just doesn't look as attractive as it did, and this trend will probably be carried on as time goes, because of the necessity to keep the traditional view, to not shatter dogma, whereas that view isn't fitting anymore.
Do you think it is really possible to live forever? Do you want to create a heaven on earth?
Depends, what do you call heaven here ? Immortalists and transhumanists are not longing for the Garden of Eden of old, we're not gnostics or anything like that.
We want to live our lifes to the best of their possibilities. We want to be happy, or to live in a world that we'd like to live in, inasmuch as possible. How we define that world has, however, nothing to do with our will to duplicate Heaven on earth. Specifically, we don't plan to recreate what is seen as "God's Heaven" on earth. Because that heaven is not exactly what we want, nor is it even a decent description of what our future could, and should be like.
What if there is a heaven ... after all?
What if there is ?