How can I accept myself?

How can I accept myself, when nobody else does. I may not be "obese" actully, you could say I have a body many people would die for. I'm the skinniest person in my family, and believe me, my family never lets me forget it. "You're SO skinny"- "Eat a little more"- are two of the most common comments I recieve on my weight. Obviously my family isn't okay with my body, how can I ever look at myself and be content. You'd think hearing comments on being underweight would make me want to gain weight- however- snide "skinny" comments do nothing less than the oppsite. "If I'm skinny now, what would I look like if I was just 5 pounds lighter?" Many questions like that took over my mind, "What would 10 extra calories do to me?" "What if I skip this next meal?" Eventully, I could no longer just ponder the effects of these questions in my head- I had to make my curiositys become my reality. I've gone 4 days without eating- and occasionally, I still to this day make "Food Free" days. They're pretty easy to understand- I go 24 hours without eating. The results of these harmful days varies, sometimes- it works, and I drop a dew pounds- sometimes, somehow, I gain weight. Nobody in my family know how much their comments harm my confidence on my body. I hope and pray that I get the confidence to stop my random "Food Free" days, and learn to accept that I may be smaller than normal. One of my goals for life is to look in the mirror, smile at myself and mean it.