Say Goodnight

Ok, my interpretation could be way out there but when I heard this song this is what came to my mind.

I think it is about a guy who is loosing his wife, who will go to heaven because she is faithful to him. He is losing her not because she is dying, but because he used to be someone different and have a different life and he has been holding on to that side of him and he is living his life "in misery" because he has to choose between his wife and who he used to be. In the end he starts saying he'd "sacrifice this world to hold you" and decides to choose "here i am with you i'm there til the end" and when he says "memories are calling so farewell my friend" he is referring to who he used to be, possible an alcoholic and alcohol was his friend or something like that, and he is saying bye to his friend to be with his wife and child.