This dream may symbolize your longing for closure and guidance from your father, who has passed away. The black endless room filled with smoke represents the unknown and the uncertainty of death. Your father’s presence in this dream may be a manifestation of your subconscious desire to connect with him and receive his advice. The sound of his footsteps resembling someone walking on water could symbolize his spiritual presence and the idea that he is watching over you. His advice about your mother, girlfriend, job, and life may reflect your inner thoughts and concerns about these aspects of your life. The mention of spending more time with your grandmother, who will soon pass away, could be a reminder to cherish your loved ones while they are still alive. Your father’s apology for not being able to say goodbye may represent your own feelings of regret or unresolved emotions about his passing. This dream may serve as a way for your subconscious to process your grief and seek closure with your father’s passing.