Mental weakness. Of talking to people!

I don't know where to start. It was so smooth till my high school. I did my best result in high school and I was determined to persue my career harder and i choosed the course of my own and i took admission where i wanted to. But i don't know how and when i started to lose my energy, my confident since my college days.I felt so inferior physically and over all, that i started to think it wasn't for me,im so outdated to be there.And i lost my one year.I had failed in first year exam.I know how i went through that time.The night before my exam i couldn't sleep even those 3-4 months i couldn't sleep well.I was so anxious that i couldn't study well.In the morning i was crying while i was travelling for my exam.My family broke down on me as they espected a good result from me.It has been 2 years i can say i feel 5% better than that period but i still don't feel any energy to do anything, i feel i'm not eligible for any job. i feel im not worthful to any person.im tired of talking to people