I want to wear low-rise jeans and tight shirts and cute crop tops with high-wasted skirts and stuff, but I hate my stomach too much to wear anything like that. I love most of my body; I love my thighs and butt and chubby face and my low+wide hips and even my height (five feet, no extra inches) and I love the way my significant other loves my body and personality equally. But I hate that my twin sister is almost thirty pounds lighter than I am, two inches taller than me, three jean sizes smaller, and drop-dead gorgeous with a mostly-flat stomach and thick thighs and pretty big butt for her size. She always tells me not to feel bad about it, but even my own mother and my step-mother have told me to lose weight. I just can't seem to. Tips, anyone?