What a great read! So Lois and so Clark.
I love love loved this:
The only problem was between the awkward ending to their earlier conversation and his current meanderings; he wasn’t sure what to say to her. No matter, he decided as he spun into appropriate flying garb, there’d be time to figure it out on the way.
“Or maybe not,” Clark chuckled upon arrival outside Lois’ place.
I grinned when I read Clark's "Or maybe not" moment! *loves* (I've had a few of those myself, where I'm certain I'll think of the right thing to say if I can just find the person — and then I still have nothing when I do. Classic).
And this was beautifully phrased:
So often, as Superman, he felt somehow more protected. As if the suit was a suit of armor, instead of fabric sewn by his mother.
In just two sentences, you've encompassed Clark's relationship with the suit perfectly.
I just have one teeny nit-pick:
Sometimes it seemed Clark really was a mild mannered reported, one with average human abilities.
I think you meant "reporter" instead of "reported" there.
Thanks so much for sharing this lovely birthday fic with us!
Oops! That's what happens when I do final revisions hours past my bedtime! Thank you for pointing this out, Crystal! I went back and made the changes. 
You know I have to try!