C.M.
try a night light and tuck him in. You also could find a book that you could read to him before bed. It has helped my son using the night light and then he also has a cd player that plays children's music. just talk to him and let him know that you are there and mommy isn't going any where. I think on top of being scared of his own room he's going through a normal stage of seperation anxiety. hopefully this works for you, if you need to talk i'm here. good luck