I dont want to feel this way abt my friend anymore. Help?

I have this friend. We fight ALOT. One time, I found out she held a grudge against me cause I "stole" her boyfriend. Her boyfriend was my best friend. (such a typical drama). So One of my good friends are also good friends with her. She told me about what she said having a grudge against me with her ex boyfriend thing, and that she actually bad talk me on someone's blog telling them i steal boyfriends. I was very pissed off, so, I confronted her. Which felt GOOD. Cause she really get on my nerves. We continued as normal. Being "friends". there are many things i cant forgive her, and i'm pretty sure she feels the same way. It's a new year, we're same cl. She's part of my group of friends. Nowadays, she's getting on my nerves again. But this time, I'm hiding it in again. Like what i did last year, I feel like I dont want to completely explode like last year and fill up a bottle of hatred. I'm scared to confront her. She's insults people, and is a *very good debater. So it's hard to say something to her. When something good happens to her, i cant help feeling annoyed. When something bad happens to her, i cant help feeling happy. When we're together, I cant help feeling awkward. I dont want to have this feeling of hatred and grudge towards her, i thought it was a new year, and that we can have a new start, but, i cant seem to mend back a friendship, or get rid of this feeling. help?