I didn't get the impression Clark's distancing was an attempt to "get Lois to want a divorce", but rather an attempt to grant her an guilt-free escape from (what he assumes to be) a painful situation.
If all that had happened was that Lois and Clark found out they couldn't have kids, and Clark took it upon himself to, basically, push Lois out of the marriage against her will, "for her own good", that would be different. But after the way Lois has ignored him for the past year or so, I honestly don't think he realizes how much pain a divorce would cause her; he's concerned that she will stay with him out of guilt because she knows how much pain a divorce would cause *him*.
Also, and I know I keep harping on this, but Lois cried when they made love. That has got to have shaken Clark to the very core. Believing what he believes, I can't help but see his actions as incredibly selfless and, yes, even loving. </me ducks>
I do understand what others are saying about him being wrong in (once again) making decisions without discussing them with Lois. The difference, as I see it, is that the last time, Clark *knew* Lois didn't want to break up with him; this time, he doesn't know that. Well, I mean I guess he knows she loves him, but he also knows she can live just fine without him (as she has been doing for pretty much the past year) and he believes that staying married to him is causing her pain. Again I say, these two need to talk!
