*pets Severus with you* It was a bit, wasn't it? Ah well, at least he's at peace now. : )
And yes, I don't think anyone but Severus could have stood everything that happened to him for as long as he did. It takes a great strength of character to do half the things he had to during the war. And then afterward, when he has nothing else to occupy his time with and can't block out the memories...... I don't think an addiction to Dreamless Sleep is too far-fetched. *pets Severus again* The poor dear. *hugs*