I'd like to re-read a fic, but I don't remember the title. The plot is: Clark and Lois are in Smallville; Clark is upset because Lois is more distant and he's afraid she wants to break-up with him..but then he finds out she's pregnant and asks her to marry him.

Any idea? Thanks

Could be "Into Each Life" by Kathy Brown

I read this story and I'm sure it is Into Each Life...

yes it is! THANKS