Dismissed it as something easy to do? This is a completely hypothetical situation that is in all likelihood nigh impossible to come to fruition in the near future in our lifetime to take advantage of, perhaps ever. I just theorised exactly the same as you have and gave my view. I didn't dismiss anything nastily as though it was definitely wrong.
I just think it would be the only way to have to live if people afraid of getting too hurt by being too attached, don't get attached.
For me, I'd fall in love again and again, sure it would be sad but hey, you're immortal. That loss would only be a speck at the end and at least the happiness would be longer even though also a speck.