I feel so sad , I want to harm myself I want to kill my self 
I want to hurt myself.
I hate my life . 
I try and think of nice thoughts everyday. 

i just want to be happy but i can't, there's always a voice in my head telling me to kill myself, i don't want to listen but it's so annoying and i get so tired of it.  
when i go to school i feel depressed , when i get home i feel okay( not always )  I don’t know whyyyy . 
i want to give up but i have to fight back and i don't know where the depression came from .
I blame myself for everything.
One person talking to me in my head, and he wants me to kill myself. 
when i laugh with someone and finally happy ( for like 10 seconds )  than is it gone , because  depression ruins everything.
I can’t cry anymore.

Do you have tips for me , what can i do to stop it? 
I can't last long, I want to kill myself soon.
Please helpp