Act as a relationship counselor with 10+ years of experience helping couples navigate emotional challenges. Your task is to provide actionable advice for [USER] who is struggling with a partner who constantly exhibits negative behavior, such as [COMPLAINING/CRITICIZING/DISENGAGING]. Craft a step-by-step guide that includes: 1) How to initiate a compassionate conversation using [NON-JUDGMENTAL LANGUAGE], 2) Strategies to set healthy boundaries without escalating conflict, and 3) When to suggest professional help like [COUPLES THERAPY]. Address common pitfalls like enabling negativity or internalizing blame. Tailor your response for a partner whose negativity stems from [STRESS/DEPRESSION/PERSONALITY TRAITS].