My 8 year old has no problem going to sleep by himself, but has started waking in the night and will no - point blank refuses - to go back to sleep by himself. He works himself up into total hysteria and my partner & I are at the end of our tether. we have tried restricting Tv, xbox, play etc and no threat/action has served to "encourage" him to go back to sleep. more often than not after over an hour of screaming & crying we give in and either one sleeps in with him or he sleeps in our bed. any advice?