Started my health Change Tomorrow! (Female 18)

I'm sick of feeling "fat" and not being able to fit in. I went to my friends sweet 16 the other day and I only danced 3 times out of like 5-6 hours worth of party time only because I was ashamed of how I looked like. I new I wanted to lose weight and finally be healthy but thankfully I'm starting tomorrow. Since today I ate nutella like 3 times and yeah not so good. My sister is over weight also but she's on her own diet plan. I want to be on my own but would love to meet friends here who are the same page as me!