Not able to concentrate or find interest

I am not able to concentrate in any things. Not able to build up interest and passion. There are so many things to do but feels like their is nothing to do. everything seems like nothing. Whenever I sit alone and think what I am doing. Nothing comes into my mind. There is no passion, no interest, no will power is coming from the inside, everything looks like broken. No hope in the life. I feel alone as there is no one with whom i can talk whatever i want to. I can share anything that's in my heart. i feel like nobody will understand me i will tell anything or they will not feel what i am going through. I feel there is something in me that want to say something to me and i am not able to discover that thing. i got irritate on small things. Got angry easily without any reason. Sometimes want to just cry without any reason. there are friends and family but still there is n o one. i am not able to trust the persons. I feel conscious about what other people think of me. I don't know.