I don't want to live anymore

I'm 23 years old.I don't want to live anymore.I think about death every night when I go to sleep since I was 10.I'm afraid anything will happen to one of my parents so I prefer to die before them.
I hate my old sister soooooo much she's killing me.I want to get rid of her because she cause me many problems and even when I finished collage I couldn't get a job because of her.
I don't like the way I look.I think I'm the uglies girl in the world.And I'm also stupid.finally I don't want to hear the voices people make when they eat or drink I get really nervous and almost cry.
Excuse my language I'm from Yemen and I tought myself English because my father didn't let me study in English institute because my old sister didn't go so I can't.

Read the articles about suicide in Web4Health.

Try to find someone to talk to and discuss your problems with. You need help which I cannot give with an answer here on the Internet. You also need to talk to a doctor, preferably a psychiatrist, who can help you.