I am 17 and I absolutely hate my body I'm not overweight and not anorexic but I constantly work out and eat as heathy as I can so I can have a hot body but no matter how hard I try I see other women with slim and hot figures and some don't even try hard I feel so ugly bout my body and I get so frustrated with my body. I just want a flat stomach !!!! Why won't it happen and my boobs are that saggy other girls have these plump bums and round boobs and nice slim tanned stomach :( I feel so bad right now couse I didn't work out today

What you see is not how it is. That being said, what is hot is perceived by all of us differently. Just because you do not have a slim waist does not mean that you are not hot. Just because they have slim bodies does not mean that they are happier.
Thinking this way about yourself will lead you down a path of self destruction; you could destroy your physical and mental well-being if you continue to choose to feel this way.
My advice to you is to set up a plan for yourself. If it is really imperative that you have a slim waist, plump bums and round boobs, set up a workout plan which will target all those areas.
I recommend http://www.bodyrock.tv/