Is OTHER wrong in the post ? POST :  Yesterday I  started a new course at university. Another woman in my class, whom I  don't really like, picked the same class. The reason I don't like her is  that I have friends who work at our uni department and I know that  she's treated them very badly, however I don't have a personal issue  with her and we've never had any conflict between us directly.  I've  never said anything rude to her and vice versa.

Anyway,  this woman recognised me and sat next to me during our first class. I  answered her questions but I didn't really do anything to drive the  conversation forward. While the teacher was talking she would also  continously poke me to ask what he said/meant etc., which I found  annoying because I get very distracted by stuff like that. So eventually  I just started saying "I don't know" to everything. During the breaks  I'd also leave the classroom without talking to her. Later during class  she asked for my number so she could ask me questions if she didn't  understand something and I kinda just diverted from the subject, since I  didn't want to give her my number. About 30 minutes later she puts her  phone in front of me for me to write my number. I still didn't want to  but I also didn't want to outright refuse, so I gave her my number and  then looked at the front (because the teacher was talking.)

Didn't  think much of it but today before class this woman confronted me for  "how I was behaving." She said she was upset that I hadn't helped her  during class and that she felt like I didn't want to give her my phone  number. She had seen on my computer screen that I had written down  things that I'd told her that I didn't know.. She said that I  have a very "hard personality" and that I'm someone who picks and  chooses who I want to help and be friends with. Honestly I got pretty  suprised by all this because I kinda expected her to take the hint  and leave me alone. Now I'm thinking that maybe I'm just a very  insensitive person. I know I can come off as pretty cold and that I  don't smile very often when I'm talking to someone I'm not interested  in. I'm also a very introverted person so sometimes I might  underestimate how important social interaction is for others.

I'm not sure whether I should apologise or not (partly because I don't want there to be an hostile enviroment in our classroom.) When she confronted me I basically just said "okay", which I realize can be seen as kinda nonchalant.

AITA?