Hello! I am 13, turning 14 in Feb! I am always insecure about my weight, ALWAYS. I go to an all girls school so having a "good body" or looking good depends on your life. I really struggled with my weight as I was unfortunately I was born with a 'ring' around my neck (aka a small double chin). It doesn't appear when my chin is up, but when I look down and tilt my head, it shows and then all my friends giggle. All of my friends are skinny, actually most girls at my school ARE skinny. Now, the main reason I want to lose this 'puppy fat' is because I am attending Hyper Japan, which is a giant anime festival, it just so happens to turn out that i'm cosplaying. I'm cosplaying as a character with my friend and it's really stressing me because i know she's going to look WAY better than me :( I searched around and luckily enough, alot of curvy and plus size cosplayers attend and get just as much love as slimmer cosplayers. My main point is I want to look better in my cosplay and grow skinnier so I won't panic as much. But to make the matters worse, my mum is against me dieting and believes i'm going to 'starve myself', which I WONT. I asked her if we can buy a treadmill so I could run on it once a day for an hour or so but she denied saying that it was way too expensive, eating healthily will be hard as my dad and brother both eat quite unhealthily and give me their food most of the time. The last time I checked my weight, I was roughly 10 stone? Now that christmas has gone, i'm having high doubts that's gotten any lower. Can someone just give me ANY simple advice on loosing this chubbiness and being able to feel happy with my body(whilst being healthy at the same time)

Thanks!♡