I am currently in my third year of college. In my first year of college, my roommate was my best friend at the time. We developed a very emotional and sexual relationship (which was of course a huge mistake) - which eventually became emotionally abusive. At the beginning of our second year, this relationship became fully platonic, but our emotionally abusive behavior toward one another continued. She eventually started dating a guy (20 years older than her and her first boyfriend! lol), but lied to me about it for almost half a year. Currently, she is probably still dating that dude (not for sure). I still run into her on campus, and we've had a lot of falling outs and then forgiving each other. But even the thought of encountering her makes me visibly anxious. Yet, just the other day I saw her, felt that anxiety, and talked to her and all of the anxiety disappeared. It was like we were still friends again with the way conversation could be made. I have blocked her on social media and don't have her phone number in my contacts. (Though I do have it memorized). This reducing my anxiety for sure. But I just don't know how to not feel strange, running into her around campus. Avoiding her actively seems too difficult. Has anyone else had to deal with such a mangled relationship?