Dreaming about a boyfriend's teeth falling out can symbolize feelings of insecurity or anxiety in your relationship. Teeth often represent communication and confidence, so this dream might reflect concerns about how you or your boyfriend express feelings or handle conflicts. It could also signify fears of losing something important or feeling powerless in the relationship.

Consider reflecting on your current feelings and any recent events that may have triggered these emotions. If there are unresolved issues, it might be helpful to communicate openly with your boyfriend to alleviate any worries you may have.