I was just about to do this on Friday, but HR had gone home and I've spent all weekend worrying about what to do.
My colleague's glass is half empty at best. Her DH has had some health issues over the past few years (I think it is connected, which makes me feel guilty) and recently she's been dreadful to be around. She's being so so rude about other colleagues, clients and anyone who happens to piss her off. We've a junior who works with us who is beginning to pick up the attitude as well.
I am really worried about how she will treat me if I go to HR. I'm absolutely terrible at conversations involving feelings and I don't think I'm the one to deal with this.