Why do i feel so depressed and ugly?

I feel horrible the guys at school always say stuff like errr your ugly why .. ? it depresses me soo much n need some advice. Does it just happen to me ? or is this normal ? I went through a really rough patch 2 years ago as girls eithen started joining in calling me names i use to think to myself why me ? I have blonde hair blue eyes but my nose is a lil bigger which realli depresses me would boys go out with a girl with a slightly big nose ? i don't think so i feel worthless. Please help =[