Dreaming of being in an old friend's house can symbolize nostalgia and a longing for the past. It may reflect unresolved feelings or memories associated with that friendship. This dream could also indicate a desire to reconnect with parts of yourself that were prominent during that time in your life or to explore the influence that friendship had on your personal development.

Consider what emotions you felt during the dream and what aspects of that friendship stand out to you. Are there any lessons or experiences from that time that you need to revisit? Alternatively, it might suggest that you are seeking comfort and familiarity in your current life. Reflect on your current relationships and see if there are any parallels or lessons that can be drawn from your past friendship.