No sleep :(

The past few nights have been really hairy here, because it has been taking upwards of 3 hours to get Ryan to sleep. And he won't take a nap either. Why my child feels he doesn't need to sleep anymore, is beyond me. Poor little guy ends up being so exhausted that by 4pm he is falling asleep in random places, like while playing or while eating dinner.... and he only sleeps on those times for about a half an hour and then runs full tilt. I don't really know what to do anymore. We keep trying different things, and we haven't changed the routine, so I am not entirely sure why he isn't sleeping. But it is definitely trying for us when it takes 3 hours of him crying before he will sleep. Hopefully, this is just a stage that will pass.