Recurring dream - being in a friend's childhood home?

I have had this dream over the years. I am by myself at one of my best childhood friend’s home. I walk through the house, but, no one is there. I sometimes expect my friend to show up, but, she doesn’t. The house is unlocked and everything is pretty much the same as it was when I was younger. I go into the basement mostly – just looking around. I always wonder in my dream where my friend’s parents are and why they just left the house.

Any ideas as to what this dream is about?