Feeling shy and fear. Myself like this.

I suffering problem like very shy and fear, it means when I talk with any one including my family I can't see with their eyes when I am talking, I can't talk face to face and when I walk on the road or sitting anywhere I observing my surroundings who is watching me especially jents and boys that I can't do my work and extra even I climbed bus also I observing conductor is watching me or driver watching me in the mirror. when I going in auto also I observing mirror auto driver will watch me or not? if he is not looking me also I feel same problem I do not see in mirror. When iam talking with my family friends also I am not comfortable with them. why happening like this. I suffering with this problem from two years. what I have to do? how can I recover from this problem? I hitted my head on Wall strongly two years ago because of this problem came for me? what I have to do now, previously I was not faced like this problem whenever I can't imagine myself like this.