Child hyperactivity issue. Depressed.

My child is finding it difficult to mingle with other children's and they usually avoid him to play with him as he becomes very angry if things do not go as expected, and sometimes if they say to him not to play with them he further becomes upset and show his anger. Also sometimes if he finds his close friend at park he starts imitating and following him and later if he or she does not behave as he expects he starts abusing and crying at public places. He is very normal during task we give to him, follows school curriculum well, writes in single sitting for 1 hours and plays very well with toys when alone. I what to know how and which doctor should we consult for and is there a way to have this issue quickly resolved before he starts further realising of this fact and starts becoming depressed.