Depressed

I feel so bad ... i’m in a depression, it’s my second one.. i feel like my life is a mess.. it’s really hard at work, i can’t go to school anymore because i can’t focus, i don’t really have friends, so i can’t talk and go out with somebody.. and my family has too much problem.. i don’t know what to do anymore.. i cry all day long and i don’t wanna be in this world anymore, if you have advice, give me some please :(