This is so sad for both of them:
...but I *want* to marry you.”
“Kal ... we can’t.”
He touched her cheek with his fingertips. “Please, Lois,” he begged. “Please don’t say that.”
But as hard as this part is, Lois had something else to deal with:
“What if people from your Planet come? What if you can go home?”
...
“I won’t leave you, Kal,” she promised. “I love you.”
To me, this is more significant than all those marriage proposals that were turned down. Here was her real lasting "Yes" that has more meaning that all the times she says "No."
Bob
