I found my dream job, abhout four months ago. I work my ass off and help everyone in the office, even people not from my department. One of my coworkers, who I sit next to and work with everyday, is one the biggest challeneges I ever had to face in my life. She's been working in the company for 8 years. Evry morning, she walks in and barely says good morning or even a hello. Anytime she talks to me she uses this monotone voice and has this blank stare while she does it. It's very hard to interact with her, because she's so cold and has very weird and uncomfortable responses, since she thinks she's superior.

The other day, I wasn't feeling too well. I wore a mask out of respect to not get anyone else sick. Everyone was aware of me not feeling well and just hoped that I'll feel ok. There was a coivd testing site outside of my office, so I decided to get tested. After, I notified my coworkers and this woman flipped out: "How dare you get tested without telling us. You don't do stuff like that. Now if you get a positive test then I'll have to stay home. Great my plans are ruined."

She gave me this selfish response when all I wanted to do was reassure everyone in the office that nobody will get infected. I got really pissed. I left the office to cool off, but when I walked back in she apparently caused some sort of chaos. The secretary immedeatly told me to leave, even though everyone knew I was sick since the morning, while I was wearing a face mask. 

I left furiously. I was serioulsy thinking about sending my boss an email letting him know how humiliated I was by the lack of respect because of her selfishness. I cooled off and called a few people from the office to understand what happened and to reassure that everything is ok. I even called this woman and tell her that we're good. She decided to give me her basic monotone response, "don't worry about it. Just let me know as soon as you get the results."

This morning I got a negative result and quickly texted eevrone in the office, which was followed by good vibes, letting me know that they're happy to hear that I'm ok. My other coworker just texted me "Thanks." This passive aggresive behaviour is driving me crazy and giving me anxiety attacks, becuase I can't respond back. I know this will result in an altercation later, which will make me have to quit. I can't continue working with this person and don't know what to do. I need to say in this job for at least a year, but I've only been there for four months and she's making me miserable everytime I show up. How can I deal with this passive aggressive, monotone, shitty personality of a person, who I need to see everyday at work, without having a heated confrontation??