I always feel low in a social gathering and try to avoid them. I have began to hate looking at myself  in the mirror and feel very low. I feel very comfortable when I'm alone and don't feel like talking to anyone. I can't maintain eye contact and end up stammering, sweating and confused when speaking to someone. It's been a long time(more than 3 years) I've been experiencing this. I feel like I'm being watched, criticised and judged always (even when I'm alone!). But strangely though I do feel very elated at times and presume I can do anything but then the fear again creeps up from nowhere and it repeates! Is there any way of ending this up?