is there a chance to ask your aunt to help him cross over? Do you know if he can tell or perhaps even see other spirits where he is? or if you could contact a medium that will help him along with spirits on the other side to get him to the right place? i am thinking perhaps subconscious you have a very strong bond with him why he has chosen you. from my experiences as a ghost I was tied up with my husband in that life, I can't say at this point and perhaps never, if it was because of love or something else. do you remember anything abnormal this night when your friend say he was talking to your father through you in your sleep? could it be your subconscious to let go willingly so he could talk or was it all done by force? perhaps very hard to answer...I'm just throwing around ideas here, as you can tell, hope something works as he seem to know his way around better and better with the things that he is doing. I've learn in my local history and maybe further people had a belief on how to do the laundry and in the water was believed to be spirits and other entities so it could be bad stuff there... so they had this rule about how to dry the clothes, even, that they had to be inside out. Could it be something like that your father is trying to show you? I know it can sound silly to modern ears...