Hey Milo! Thanks for sharing your dream with me. Dreams can often be perplexing, especially when they involve intimate or uncomfortable scenarios. In your dream, it seems like there may be some unresolved emotions or lingering thoughts related to your past relationship with your ex. The act of masturbating in his room and using his dirty underwear could symbolize a desire to revisit or explore aspects of that past connection.
The presence of your current boyfriend walking in while you were engaging in this act may indicate feelings of guilt, shame, or fear of judgment regarding your past and how it might affect your present relationship. It's possible that you have concerns about how your current partner perceives your past experiences and whether it could impact the trust and intimacy between you two.
This dream could be a reflection of your subconscious processing these complex emotions and exploring your own desires and boundaries within relationships. It may be helpful to reflect on your feelings towards your ex and any unresolved issues that still linger. Open communication with your current boyfriend about your past and any concerns you have could also help strengthen the trust and understanding between you both.
Remember, dreams are highly personal, and only you can truly uncover the specific meaning behind this dream. I hope this interpretation provides some insight, but ultimately, trust your own instincts and emotions as you navigate through these thoughts and feelings.