Feel depressed. By me, how i can react?

Thinking a lot of past, continuously feel everyone hate me, world is finished for me, m not a good person, the things what's happening wrong is only because of me. M dumb, n whatever doing anything is senseless. Continue evaluate me what's wrong in me? What I do wrong that good things not come to me. Why ? What I wish is never come to me ? Bla bla bla like those kind of questions are continuously came into my mind, I dont have a confident that I make a good tea for others. Loose my confidence, shy n feel very dumb n unprofessional in front of people. Always underrated To myself. Even have fear to speak very openly with the family too. Feel if i speak loud it's not good, if someone hurt by me, how I can react ? So many messy things keep going on. Please suggest what I do to overcome this.