How to suicide in sleeping?

I really understand that I am a stranger in world who have nothing or had nothing. I was finding why I am here. but I stopped. coz it is clear that I was born for nothing 18 years ago. I have a good parents & two sister. but for what??? even I realize that they has nothing to do. this world is hell to me now. the world always cheat me showing hope. but there are no hope. the world says, everything can be yours. but practically nothing is or cannot be yours. so I do not blame my family for theire conomic condition, do not blame my fate. I just hate this fucking world. so I want to leave it. I want to suicide in sleeping because I may not be able to leave this fucking world if I see my family on that time. the another little cause is I don't want to know them I am committing suicide. plz help...

there is always hope,suicide is last option,try talking to a Councillor and find something you enjoy instead of seeing the negative,your family would be devastated if you died