Socializing problem and depression. Pls!

I want to mix with people..make friends.. socialize...But I have this fear and anxiety of meeting new people...I fear people won't stay with me and will leave . So I try n leave them before they leave me. I am not that close to my family. I am in a dillema..I go through these temporary mood swings and depression. Suffer from lack of confidence of doing any work.. including that of my professional life.. Can't socialize at office too. Feel too burdened with work and how to go about it since I don't love my job. So feel I am not good enough for anything.. Very shy of meeting with girls or calling any of my friends. I need help. I want a normal peaceful life where at least I would have people around me. I want to get rid of my ego and mix with people freely and want people to accept me. But I fear after all these years people won't accept me or don't need me since I am not aware of the happenings of their lives neither I was beside them when they needed me the most.. help me pls