Why do boys call me ugly and only adults and other girls say I'm pretty?

Only adults and other girls call me pretty and boys act like I'm some monster or something.

It seems like guys my age judge harder on looks more than anything.If I see a girl that is really not that bad looking and guys my age will talk about her like she is the ugliest thing in the world. It seems like adults and other girls see the beauty in them. It seems like teenage boys over-exaggerate a bit. Why is this? Can I get a guys opinion?
Why do boys call me ugly and only adults and other girls say I'm pretty?
Post Opinion