When there is social gathering 8-10 people I feel nervousness and scared to speak and don't find any word to speak.Infact I got bored and want to run away.How can be a leader of group
Please help

Why?
Why do you feel this way?

I don't know what is the big reason,I feel it is related to mind and since childhood I was not in contact with social gatherings

Have you ever thought of going to see a physcologist?
Maybe this has something to do with your past and maybe you are not even aware of it.