Ooh! A discussion!! Cool!
I know what you mean, and so does Orogond. He knows that one day he will be taken into the Light, whereas Gaelen will go on to Elysia. Because the Elves are such spiritual creatures (they have visited the afterworld several times in the books) we are fairly certain that they are correct about their destiny (it's not just a myth or a 'belief'). Men, on the other hand...well, no one is really sure. WE are, though, because we've seen it!
Orogond does not know whether he will outlive Gaelen or not. Obviously, that will only happen if she is killed, which, given her penchant for getting herself into mayhem, is not unlikely. But if she survives him, she will be forced to part from him forever. The death of Rain nearly destroyed her...I feel bad for the little buzzard if she is left alone again. She truly loves Orogond and is bound to him until death do them part.
Is there a way that Orogond and Gaelen can be together for eternity? What do you think?
(I'm afraid Rain has to be included...he's been waiting a long time already and he IS Gaelen's destined life-mate.)