I remember a time when my ex and I were on the outs and he had gone out and gotten wasted. I passed him in the hallway of our building and the look he gave me was of blind hatred! I told his mother that it was like looking into the eyes of a demon, like he wasn't even in there anymore.
My wasn't evil like that, just in a constant fog and sad. When she got out of her 30 day program I thought, "there she is!" I hadn't seen my lil muffin girl in years! It's amazing! She was a smiling, laughing goof ball again! It took much longer after that for her to settle back into life, but she's never looked back thank God!