nobody's fault but my own.

I hate my body. I hate my body so much it's getting to the point I'm finding myself ugly. I've heard it so many times, "but you're not fat", " you're so tall and skinny". But when I look at myself I just don't see it. It's starting to mess with my head I'm afraid. I'm terrified that people will think I'm crazy. Should I consult someone about these issues? Idk what to do. I just need advice.