believe me i feel what you are saying.. my son is 3.5 and i have had to put a spare bed in my room so i can sleep on it cause he wont sleep alone,...
Big Problem.. He used to just go to bed and i would shut the door and he would go to sleep now im falling aslep and his still up talking to himself..
I also have the same issue with him being clingy his literally up my butt with no issue living up there i reckon..

I at the moment am taking him to behavioural specialists and peads as the dr said it could be an issue that could be so simple but yet unknown if that makes sense.. Im also trying to brain wash him into believing i have monsters in my room and his room is full of cars and scooby doo but he isnt buying a thing he says he has to be with me to stop the monsters from taking me.. My DH is fed up but im also stuck..