I'm 13 and I've never been diagnosed with an eating disorder but lately I've been obsessing over my weight I'm 5'4 and 87 lbs which makes my bmi 14.8 I think. I want my weight to be 80 lbs and sometimes I look in the mirror and see myself as normal weight or even a bit chubby but then when I look at photos I see how skinny I actually am. People also say to me a lot "your really skinny" "do you ever eat?" Or "you should gain some weight" and that just makes me look in the mirror more. I also am scared to tell anyone... Any help?