Weight loss

I'm still in the early stages of highschool and I'm obese. So far I'v lost 40 pounds and there are 80 more pounds for me to loose. I tend to eat a big breakfast so I'm not to hungry at lunch time, and now these 2 girls keep asking me why I don't eat at lunch if I'm starving myself (which I'm not)and telling other kids that I'm starving myself to loose weight. What should I do?