Thin is the definition of beautiful

Im 16, and im only a tiny 5ft. This makes my weight seem really obvious and im not going to lie im huge. Its hard to find clothes to fit my shape because of my small fat figure and its time to make a difference. Im sick of all the people who say 'you're fine as you are' and 'you dont need to lose weight, you're not fat'. Well i dont want to be 'fine' i want to be so thin that people worry about me. And i do need to lose weight cause i am a fucking whale!
Stats, height 5ft, SW: 133, CW: 130, GW1: 115, GW2: 100