Originally Posted by
Darth Kal-el
This Clark reminds me of Smallville where he never told anyone they had to discover. Chloe saw him catch a car. Lana saw him rescue Chloe and Lois saw him fall from a building with kryptonite in him
First, Lois found out because she could tell Clark from his kiss when he, as The Blur, kissed her. Seeing him fall from the building just confirmed it. Clark didn't know Lois found out that way, though, so when he finally told her in "Isis" he was confiding in what he thought was an unaware Lois.
All my life I’ve been afraid, Lois. Afraid of people knowing the truth about me. Afraid of them rejecting me, and even if they didn’t, still losing them. I’ve been afraid of everything I can’t control. But when I was faced with the idea of losing you forever, it made me realize there’s something I’d regret more than anything else, and that’s not telling you the truth about me. ‘Cause that’s the only way we could share a life together. I know the odds are stacked against us and we’d be risking everything, but if you’re ready to take that leap, there’s no one else that I’d want to take that leap with.