And now it's official. I can no longer talk to my coworker about ANYTHING other than complaining about our jobs, which I am making a concerted effort NOT to do lately, as it's completely non-constructive, and I'm tired of spending my whole 8 hours in the office every day being negative. And in an effort not to do that, I've tried to talk to her about more personal things, but she is now so completely consumed with negativity that she literally argues with me about everything personal I try to bring up. She literally berates me on things or makes negative statements with absolutely no basis (like about my family members whom she has never even met!). She just HAS to be negative and bitchy about EVERYTHING. And I'm done with it. I've stopped asking her to lunch already, and while I miss having company at lunch, I don't miss the negative crap at all. I'd rather read a magazine alone. And now I'm going to start narrowing our interactions to as minimal as possible unless she happens to approach me first. I just can't take her attitude any more.