You have two options Cloud. Either find a way to give them your longevity so that you may all enjoy eternity together. Or accept that one day you must leave them behind.
"All worlds begin in darkness and all so end. The heart is no different."-Ansem...
I don't know anything for sure yet. Maybe I'm just worrying myself for nothing... if I'm not, I'm sorry for bothering you about it.
If I do... I don't know. I don't think I could stand being alone again. I thought I could, but it just hurts too much.
I've thought about killing myself around the time I would have died, or maybe asking Tifa if she...
MY SOUL IS DARK BUT MY HAIR IS COLORFUL — Brahian Pokémon Alchemist-sighs-
Cloud. You have to realise that you are above humans now. Physically anyway. And you seemnto have retained your mortal heart. This is a good thing. But should Tifa and Denzel die that will not be the end. Love can be rekindled as many times as you wish. Vampires go through hundes of thousands of lovers. And have just what you and Tifa do. But in the end if they cannot bring themselves to elevate them from mortality they must say farewell.
"All worlds begin in darkness and all so end. The heart is no different."-Ansem

-Arnaud walks downstairs, in civilian wear, musket in hand- Something going on?
"You'd never do something as irrational as dying."