If you want to loose weight then you should but healthy methods like eating 3 meals a day, a big breakfast and smaller meals after, not eating after 5 and exercsing as much as you can are what I think is healthy however that may be wrong.
Do not go down the route of eating disorder, I did at 13 and 14 was bullimic sadly i didn't loose much weight but actually gained more in the long run.
Your only 13 and boys are not the world, I find boys now are immature and annoying really and I am going to think about boys when they mature.
Also you are still growing so in a few years you could loose loads of weight naturally, my friend lost loads of weight at 14 and shes gorgeous now, people maturing and growing up is a withdrawn process some people faster than others, you should look a head and think in two years or 3 I will be 16 and decide to eat the right ammounts of food and take regular exercise but be healthy you need a healthy body to loose weight and keep it off. Oh oh, at the moment boys will follow the trend of skinny girls but as they get older I notice so does there taste and they are attracted to girls with fuller figure, bums and thighs and breasts so don't worry boys will love you for who you are.
From Hayley x