Self Image Issues

So, I was fighting myself with posting this because I'm pretty sure if I get any comments at all, most of them won't be nice, but I have struggled with pretty low self esteem for a long time (I am a sophomore in high school) I always feel like I am being compared to my friends, and I don't feel like anybody looks at me for who I truly am. I have always been worried about my body, and how my body is shaped because all of my friends are a lot smaller than me. 
Today I had a guy tell me that I was one of the manliest girls he knows, just look at me, and it really got to me, because I always tell my friends that in pictures I look like a little boy. Him just saying this to me, just made me really look at myself, and begin to judge a lot about me. I don't really know what I was trying to get out of all of this, it was more of just a rant and I needed to get it off of my chest.