In this situation, the best response would be supportive, validating, and proactive. Here's an example of what you could say to your roommate: "I'm really sorry you're going through this. It’s completely understandable that you don’t feel safe. Your feelings are valid, and you don’t have to deal with this alone. Let’s think about some steps you can take to protect yourself, like tightening your social media privacy settings, blocking suspicious accounts, and maybe documenting everything that’s happening. If you want, I can help you reach out to campus security or counseling services-they’re there to support you. Your safety and well-being are the most important things right now." This response shows empathy, offers practical help, and encourages your roommate to seek support from trusted resources.