Co-Worker Nightmare

So I'm sure everyone has that one co-worker. The one who brown-noses, listens to every conversation, is very condescending, and is just a plain bitch/asshole. NO? Well I do. MY GOD do I. When I first started I could tell right off the bat that I wasn't going to like her. I just didn't know the extent. Now 7 months later, every day is a struggle for me. All the irritations range from her giving me things that she should be doing not me (and she's not even my boss) to her over hearing conversations that I'm having with another co-worker and giving her two cents. She always has to be right about everything, fighting me tooth for nail on every point. Every day she does NOTHING but feels she has the right to rat on other people for "not doing their job" (even though they are). It's gotten to the point where even her appearance and how she looks is getting under my skin. From her turned up nose to her plastic looking skin to even her nubby fingers, which REALLY freaks me out. I don't know how much more of this woman I can take. It's gotten to the point where I come home every night and vent about the Nancy-isms that happened that day and during the night I'm plotting her murder in my dreams. I love the people I work with but it's because of her that I need to get out. I don't think I can take any more. I feel as though one day I'm just going to blow up. I hope it doesn't come to that point. But as for now, I bite my tongue and try to look forward to the weekend. :/