English: "I can't believe you're dumping me for that guy from the CSI: Miami knockoff." Vietnamese: "Anh không thể tin nổi em bỏ anh vì thằng cha trong phim nhái CSI: Miami đấy."
Option 3: If you need a short subtitle line from a scene (example: Peter’s famous line after the breakup) forgetting sarah marshall vietsub
Option 2: Title translation (more natural / conversational) English: "I can't believe you're dumping me for