Losing weight

I just chatted my friend and showed me her new photos with our other friends.I really envy them for having such a nice figure while me,getting bigger and bigger each day :( I'm thinking of taking some diet pills to go with my exercise.I just want a supplement that will help me burn my fats.Everytime I look myself on the mirror,I feel so sad because I wanted the body that I have before but I just couldn't resist eating my favorite foods.I will have to ask my doctor what is the best and safe diet supplement that I can take.