How does a teen lose weight fast?

5 meters, so 14 in one, and I weighed 160 kilograms! I was a fat, you need to lose weight. You, if I was to impress this guy, please refer to his girl and is very thin, so like, if perhaps I was thin my face and the light turns sick, Not such a beautiful course, to lose out! I watch gymnastics 9. Since one week, I need something thanks