For context, I (20F), and my ex boyfriend (19M) broke up about 5 months ago. My best friend (20F) is also my current college roommate, and we’ve been inseparable since the day we moved in together freshman year. During our sophomore year, my ex and my friend became friends before we started dating, so there was already an established friendship there. Also worth pointing out that my friend is gay so I’m not worried about anything romantic happening between them. My friend has expressed to me that she wants to live in an apartment as opposed to a dorm for our senior year, whereas I want to stick to a dorm. No big deal, I can always find another friend to room with. However, she was offered the opportunity to move into an open space in an apartment with my ex boyfriend and his friend (21M). I find this especially weird because throughout my relationship with him, she had to see me crying and essentially being miserable because he hurt me and constantly neglected me, hence the reason we broke up. And it’s only since the breakup that they started hanging out a lot more than they normally do, including taking a day trip to New York during the summer. And she thought it would be a good idea to share this information with me, knowing how uncomfortable I get at so much as seeing a picture of him. Now, my ex is a good person, he’s just extremely immature, so I don’t expect that he is up to something malicious, but it does seem suspicious that once we broke up, him and my friend have slowly been getting closer. I expressed to her on multiple occasions how uncomfortable this made me, but she insists that it’s her choice and it’s not any of my business where she chooses to live next year. I would agree if it was any other person, but we’re talking about my ex, who she knows broke my heart and destroyed my mental health. AITA? Edit: I also want to mention that my friend and I are both neurodivergent, meaning we have our own struggles when it comes to understanding certain social cues and feelings.