An interesting point of view,
Horatio. The thought would never have occurred to me, being an atheist and therefore certain that there is no afterlife at all. I quite agree, though: immortality would be boring if everyone else were to share it and you'd be stuck with the same people eternally. Perhaps that's what inspired the idea of reincarnation in so many religions?
I am with
RJD on the question of falling in love for the thousandth time. Been there, done that, still doing it all the time

I have loved many men and quite a few women and most of all I am deeply and hopelessly in love with life.
Perhaps that's one of the advantages an atheist has over a religious person: for me, there is no eternity, afterlife or reincarnation. There are only about 30,000 days. Much too little time to not make the best use of every single one of them. I can't go back to check off things from my to-do list that I missed in the first round. So I make a point of living each day as if it were my last.
When I die, I will be able to pride myself on having sniffed on every single rose I saw, stroked every stray cat or dog I met, watched every colourful sunset, admired every coloured autumn-leaf, enjoyed every delicious meal and loved every male (or female) who appealed to me. And no regrets.