There is no magic cure for depression, the only cure is within yourself. You seem to be carrying a mask around with you, everyone sees it and it impresses/intimidates them, but it's also a barrier, no-one can see your insecurities, but you can't see them either, and hence you are alienated from them.
People have stopped seeing you as human, instead they simply see the big impressive front you put up when they are around and forget you are human, and cannot empathise with you, unfortunately with that front in the way, neither can you- hence: mututal alienation.
Dealing with this is difficult, you need to begin to let people gradually see you are human, gradually lower the barrier. If you let others see your weaknesses as well as your strengths communication is easier, bonds are more easily made and interaction and socialising become easier too.
Counselling can make lowering the barrrier between yourself and others easier, but ultimately it is up to you. You are the only one who can solve this problem, pills can numb the symptoms but will do nothing about the initial cause of the problem- your social barrier and insecurity.