The dream of flooding represents a sense of being overwhelmed and out of control in your waking life. The fact that you were not initially concerned suggests a tendency to downplay or ignore your emotions. However, as the water fills up your home, it symbolizes the emotional impact of the situation becoming too much to handle. This could be related to a current situation in your life where you are feeling overwhelmed and struggling to cope.
The appearance of your old childhood friend may represent unresolved feelings and unfinished business from your past. The fact that you are met with silence and unable to speak suggests a fear of confronting these emotions. This dream may be a reflection of your subconscious processing these unresolved feelings and longing for closure. It could also be a reminder to address any lingering emotions and move on from the past.
Overall, this dream serves as a reminder to acknowledge and address your emotions, rather than suppressing them, in order to find closure and move forward in your waking life.