He just has to love her enough, love her better than she's ever been loved before.
For if you swear this, I shall love you as no woman has ever been loved before.
"Truly, my beloved, you have loved me as no woman has ever been loved before."
"I have never loved before, never in all the time since our crew scattered."
You woo so well that I think you must have loved before.
"I have not loved before, but I do love you."
I did love him but not in the wild unreasoning way I had loved before.
He was going to love her as she'd never been loved before.
The truthful answer was, because I suddenly knew we have loved before, more than once, in previous lifetimes.
"He loved me as no one had ever been loved before."