Dreams involving violence or harm to loved ones can be quite distressing. They often reflect underlying fears, anxieties, or feelings of helplessness in your waking life. In this case, dreaming about your girlfriend being tied up and attacked may symbolize concerns about her safety or your ability to protect her.
It might also represent feelings of vulnerability in your relationship or fears of losing her. Consider reflecting on any recent events or emotions that might have triggered this dream. It could be helpful to communicate with your girlfriend about your feelings and any worries you may have. This open dialogue can strengthen your bond and alleviate any anxieties that may have surfaced in your dream.