by son

Shalom,

My son , 5 years old, suffers from missing friendship in the kindergarden and is reacting to this very physically. He disturbs childen sitting next to him during meetings in the kindergarden as well as he will starts to push them or beat them when they decline playing wit him. I saw on various occations that he retreats to his own world as another reaction and is lately unable to receive a " NO" from us. He reacts with long shouting and crying. The kindergarden stuff also confirmed me a light concentration leap, though he can play and build a whole town with lego for hours or watch a movie for 3 hours if needed. On the other side when waiting in a line with other children for whatever reason he will kiss them or do anything else just not waiting in line silent.When I talk to him he claims his reations based on the behaviour of the children to him but I can see his physical reactions also at home towards his small sister.
I very much want to break this circle of physical reactions but am running out of sources. His father and me tried for a whole year all possibilities to break this circle without success. Would it be possible to send me a contact in the area of rishon le zion for advise or if needed treatment? Your help is very much appreciated and any answer can be in hebrew as well.