Dreams about a partner cheating can be quite distressing and often reflect feelings of insecurity or anxiety in the relationship. Here are a few possible interpretations:

1. Insecurity: This dream may indicate feelings of insecurity or fear of abandonment. You might be worried about your relationship or how your boyfriend feels about you.
2. Trust Issues: If there have been trust issues in the relationship, whether due to past experiences or current circumstances, this dream could be a manifestation of those concerns.
3. Personal Reflection: Sometimes, dreams can reflect your own feelings of guilt or fear of betrayal. Consider if there are any aspects of your life where you feel unfaithful to yourself or your values.
4. Communication: This dream could be a prompt to communicate openly with your boyfriend about your feelings. Discussing any fears or insecurities can strengthen your relationship.
5. Change or Transition: If you are going through changes in your life or relationship, this dream might represent your anxieties about those changes.

Consider reflecting on your current feelings and situations in your relationship to gain more clarity. Dreams often serve as a way for our subconscious to process emotions and experiences.