<human>: Condense the text into a few key points

I started at a new company 2 months ago and there is an intern here who has been here for nearly a year that I really don't get along with. Outside of work situations, we generally enjoy each other's company, but at work, I get very frustrated every time we interact and even angry sometimes.   

For example, I pointed out an error in one of her reports in private, and she got extremely defensive and read her internet source across the office to me, while staring at me. I understand we take pride in our work, but it was a simple error that was easy to correct that really didn't warrant this kind of reaction. She is also very intrusive when it comes to my work. Generally when we provide feedback, it is topic-oriented such as "this data needs to be changed", but she will tell me "you put in wrong data". I wonder if I'm being overly sensitive, but I often feel attacked by her comments. She will purposely say things to establish that she knows more than I do, and when I turn out to be correct, she'll never admit her fault. It all reminds me of how girls used to passive aggressively say things in high school and I really want to be past that phase in our lives.   

I kind of see where she's coming from, she's been here longer and she's trying to establish her dominance. She is a completely different person to me than more senior people in the company. Her body language and behaviour is all very demeaning, and it makes me uncomfortable, frustrated, and sometimes angry because I've shown her no disrespect to warrant this. She is also very well liked by management and will probably be hired on full time after she graduates.   

What can I do to improve this relationship? I really want to work in a more harmonious environment and be rid of all this unnecessary friction and pettiness. Any advice is appreciated!
<bot>: Intern at work has been there longer than I have as a new hire and is slightly hostile towards me to establish dominance/seniority. What can I do to smooth out this relationship?