Yes, it is entirely understandable to feel angry or upset about your friend's behavior regarding self-harm. Using terms like "cuties" to refer to injuries from self-harm can be highly inappropriate and insensitive. Self-harm is a serious mental health issue and should not be trivialized or joked about.
It is essential to recognize that your feelings are valid, and it's okay to express your concerns to your friend. Communication is vital in any relationship, and discussing how their words are impacting you and others can help them understand the gravity of the situation.
Your friend may not fully comprehend the seriousness of self-harm and the impact of their language on those struggling with such issues. By addressing the situation calmly and honestly, you can raise awareness about self-harm and its effects, potentially leading to a more empathetic and supportive environment.
Remember, if you or your friend need support or assistance with mental health concerns, don't hesitate to reach out to a mental health professional or a helpline for help. It's crucial to prioritize your well-being and the well-being of those around you.