Well, what's going on here then?
DS1 (nearly 7) this week has been having a real panic if he doesn't know where I am or I leave his side. Example:
Left him watching TV to go to front door to talk to builder - cue him crying and getting in a state cos he couldn't find me.
Today in a cafe - we were in the queue and he wouldn't leave my side to go about 12ft to get a carton of juice!
In the house he nearly always follows me upstairs or down as well.
I have thought that maybe it's a bit of attention seeking cos DS2 is taking up a lot of my time at the mo with the terrible 2's!!!!