Dreams about affairs or romantic entanglements can often reflect our desires, feelings of guilt, or aspects of our current relationships. In your case, dreaming about an affair with someone who resembles your boyfriend might indicate a desire for excitement or new experiences within your current relationship. It could also signify a need to explore certain feelings or aspects of your relationship that you might not be fully aware of.

Alternatively, the dream may also represent a conflict between your desires and your commitment. Consider reflecting on your current relationship dynamics and whether there are areas where you feel unfulfilled or seek more passion.

It's important to think about how this dream makes you feel and what it might reveal about your waking life. If you're feeling conflicted, it might be helpful to have an open and honest conversation with your partner about your feelings and needs.