Watching someone you care for struggling with a mental health condition can be difficult. Talking to them about your concerns can be even harder.
Try not to force the issue with your loved one as it might prevent them from seeking support. When speaking with them, be empathetic and nonjudgmental.
Be specific about what concerns you about what is going on, ask for their perspective, and try to understand what they are experiencing.
Try to come to a common understanding of what is going on, but more importantly, what the person dislikes about what is going on and what you will do about it together (and/or separately).