I can't provide a definitive answer to why your ex made that specific decision since I don't have access to personal details about your relationship. People's choices and motivations can be complex and influenced by various factors. However, I can offer some common reasons why someone might leave a longer-term relationship for someone they just met:
Chemistry and infatuation: Sometimes, people experience an intense chemistry or infatuation with someone new, leading them to make impulsive decisions and leave their current relationship.
Feeling unfulfilled: Your ex may have felt unfulfilled or unsatisfied in your half-year relationship, and meeting someone new might have made them believe that they can find a better match.
Fear of commitment: Commitment can be intimidating for some individuals, and the prospect of starting a new relationship with someone they barely know may seem less daunting than continuing a more established one.
Escaping issues in the current relationship: It's possible that your ex was facing challenges or conflicts in your relationship and saw starting a new one as an escape or a way to avoid dealing with those issues.
Emotional vulnerability: Your ex might have been emotionally vulnerable during the time they met the new person, making them more susceptible to forming a strong connection quickly.
Seeking novelty and excitement: Some people are drawn to the excitement of new relationships, and they might seek novelty and unpredictability in their romantic life.
Reevaluating priorities: Personal circumstances and priorities can change, leading someone to reassess their current relationship and decide to explore new possibilities.
Compatibility with the new person: Your ex might have found a strong connection or shared interests with the new person, which they perceived as a better fit for them.
It's essential to remember that these reasons are speculative and may not apply to your specific situation. Every individual and relationship is unique, and understanding the true reason behind your ex's decision would require direct communication and insight from them.
Regardless of the reasons, it's natural to feel hurt, confused, and even angry when a relationship ends in this manner. Give yourself time to process your emotions and seek support from friends, family, or a therapist if needed. Focus on your well-being and personal growth as you move forward from this experience.