Hate to say it, but without constant starvation and heavy, heavy exercise (that means lots of money and time to spend solely on oneself), eventually most women end up this size and shape.
It means you aren't eighteen anymore. Congratulations on living past 25.
Also, not liking your skin tone?? I think you have a beautiful skin tone and not liking darker skin is ... sort of racist, actually. There's nothing wrong with your skin. It's actually quite pretty.