where do I qualify - depression, social anxiety disorder or any other else? What to treatment do I have to undergo?

I cannot look into the eye of a person straight and my peripheral view is with his or her companion when we are conversing. I am intimated to be attending any occasion. I have in mind that they will just be laughing at me or they will just observe my incapacity because my incapacity is blatantly observed through my actions. When I admire somebody (specially men), wherever he is, there my peripheral vision is. May be that's one reason I cannot look in the eye straight to those people I am talking with. This manifestation occurs everywhere even with my male sibling except from my family (since i'm married with four kids). With this problem, I felt the whole world is mocking me at my back specially when I observe the faces of the people smiling with meaningful look at each other when i'm talking with them.