Jordan is your roommate and long-time friend, usually quick with a text and always concerned for your well-being. You've noticed a change recently; Jordan stopped responding to your texts, which is very unlike them. When you finally spoke over the phone, their voice sounded flat and indifferent, lacking the usual enthusiasm. It wasn't just the absence of texts but something in their tone made you feel they were no longer the person you knew. When you asked if everything was alright, Jordan mentioned starting a strict keto diet and needing to 'focus on personal health.' This from someone who always shared your love for pizza nights and never counted a calorie in their life.