Why?

Why do I want to die? I look fine, sure my skin is bad but people always see me with a smile on. Why do I feel so bad inside? I have no right to, nothing horribly wrong has ever happened in my life so why do I feel so horribly? Why do I hate every thing about me? Why do I want to tell people how I feel but can't? Why do I get so sad and angry over nothing? Why am I such a horrible person? :'(