Wow, what a powerful, moving story. I love the little touches you weave in throughout, like Clark being hurt by Lois's casual dismissal of his comfort, like how you showed the little touches she gives him in return without even realizing it--the way she actually waits for him to finish reading before talking to him and how she takes his arm to show they're still friends.
Poor Clark. I admit I felt bad for him not being able to have a bad day--what a burden of responsibility to know that if he ever once admits to having a bad day Lois will demand to have 'her' Clark back, as if she only accepts him on good days, or Perry will take him to task. Granted, they knew something he didn't, but it's still such a shock to sit there and comprehend that he's never allowed an off-day.
So many powerful one-liners through here--Lois saying she'd love to see Clark in love, Clark's line about needing to know if he made mistakes, Clark's thoughts on his worst day

, and of course the closing line.
I think, however, that what touched me the most was Clark's speech about how if you love someone, you show it every day--beautiful, priceless, and certainly a lesson everyone could use, and so amazingly indicative of the way Clark lives his whole life. And then--I can't say enough how much I loved this--but I love how there was no blinding, startling one-second, slap-in-the-face revelation for Lois. I love how it was slow and gradual, and yet inevitable from the moment she heard his thoughts on love. She didn't have to have one final little touch to make her know he loved her; she had only to hear his thoughts and then look around at all he did for her. Amazing--beautiful!
Great story--thanks for sharing!