Dreams about washing clothes often symbolize a desire to cleanse or release negative emotions or experiences. In your dream, washing dirty clothes at your guy's house may indicate that you are working through issues related to your relationship or personal feelings associated with him. It could suggest a need for clarity or a fresh start.

The presence of a standing tree in the room can have various interpretations. Trees in dreams often represent growth, stability, and strength. They can also symbolize personal development or rootedness. The tree in this context might suggest that your relationship has the potential for growth and stability, or it could indicate a need to nurture something within yourself or your relationship.

Overall, this dream might be encouraging you to address any unresolved feelings or issues in your relationship while also recognizing the potential for growth and stability together. Consider reflecting on your current circumstances and how they relate to your emotions and connections with others.