Weirdly insecure

I’m kind of a skinny girl, and I’m insecure about it because I wish I was thicker. I know it’s weird, but that’s how I feel. I’m small everywhere and I wish I had something more. I can’t gain weight because I have a fast metabolism. And I heard a girl (who’s thick) say “I’m glad I’m thick because guys like thick girls. They don’t like anyone who’s skinny.” I know it wasn’t directly towards me be but it took a hit to my self esteem