A couple of things.

We did an internship together and had to submit a study or a report at the end of it. She was constantly asking my help and even asking me to type her report for her. Our very experienced supervisor told me that she called him asking him to postpone the report beyond reason all thr while talking in an unprofessional way just laughing in the middle of conversation and him telling me that was an instant killer of my crush on her.

A few weeks later we met and i had to leave urgently so i said see you later to my friend and made eye contact with her just to convey that I've have to leave. I honestly don't think i did anything wrong. So later that day her text came ruining my mood. She told me how "she felt bad" because I didn't properly say goodbye and streched that conversation for more than 30 minutes. I just apologized to get out of that stupid argument and next time literally ignored her without saying anything and again she texted what's wrong with me. Now she has stopped talking to me and doing the why didn't you say bye to me when you left bullshit.