Rick's pissed at Lori for playing him and Shane against each other and now he has the weight of killing his best friend on his shoulders.

I thought she was mad at Rick for killing her "side-piece", Shane, at the end of season 2. This would make Rick's behavior toward her now make even more sense. Like, B, you're supposed to be MY wife, how can you be mad at me for killing your boyfriend!???? Really?!!!!
I hope Rick ends up with someone else (NOT Andrea) before the season is over. Maybe he'll steal the Governor's lady that was in his bed.... hmmmmm, I think I should be a writer on the show.... *note to self- fill out a job application for TWD*

 

it was about saving Hershel