Dear Abby: My longtime co-worker has turned on me in the workplace

A longtime co-worker who once shared a friendly relationship is now undermining the reader at work, creating a tense and uncomfortable environment. The reader is seeking advice on how to navigate this betrayal and the potential fallout at the office. This situation highlights the fragility of workplace relationships and the impact of trust, making it crucial to understand how to address such conflicts effectively and protect one's professional standing. The dynamics at play underscore the importance of workplace ethics and the potential consequences of shifting alliances.