something just struck me after watching the latest episode. rick might not realise it, but the family he's fighting for isn't really worth the effort. carl's an idiot who got dale killed and then turned a loaded gun on his own father (yeah yeah, it was in the heat of the moment but he's still screwed up), while lori is a mental case who keeps stirring sheet up (intentionally or otherwise it doesn't matter), and can't do a simple job of keeping either her son or herself safe. i kinda feel sorry for rick.
also, others are entitled to interpret things how they want, but as far as i'm concerned it's quite clear that shane had every intention of killing rick. BUT he has always been one conflicted, messed up SoB. and despite his plan, shane was clearly conflicted and confused in that moment when rick started talking him down from it. rick knew that was what he had to do to stay alive, so he used it to his advantage. some part of him was probably hoping that shane would still have the slightest modicum of humanity and sanity left, and stand down. but rick was under zero delusions that he would in all likelihood have to end up killing his best friend there and then.