I dreamed that I showed up in a room and met a girl and later on my boyfriend came in and they couldn't see me but I overheard that they are having an affair
Dreams can often be deeply personal and symbolic, so it's important to remember that interpretations can vary. In this dream, the room could represent a symbolic space within your own psyche or emotions. Meeting a girl might symbolize an aspect of yourself or a new experience you're encountering. The arrival of your boyfriend could represent your personal relationship or connection with him.
The fact that they couldn't see you might suggest feelings of invisibility or being left out of something significant. Overhearing that they are having an affair could signify a lack of trust, fear of infidelity, or feelings of betrayal within your waking life. It's essential to take into account your own emotions and experiences when reflecting on this dream. Communication and addressing any concerns or fears you might have could be beneficial.