He's going through a very clingy phase, but his reactions to others is different now,even compared to previous clingy phases.
He seems initially shy if visitors he knows very well, and when children approach him in the park he just freezes and avoids eye contact. It's as though he's tying to make himself invisible!
He also seems newly self-conscious; for example, he seems embarrassed and suddenly stops if he notices strangers watching him dance.
All this is so unlike how he has been up until recently. Is he losing confidence? What can I do to help him? Or should I just let it pass?