S.H.
Indulge him. Every time he gets needy, stop what you are doing immediately, get down on the ground to his level, stare at him in his eyes and give him undivided attention. Do such a good job at it that he'll tire of it eventually. Try teaching him something. Make him say his alaphabet or count to 20. Try to get him to draw a perfect circle. He should start favoring a little independent time after that! Good luck.