Guys think im not gd lookin?

ok so i starting to think im not gd lookin because guys wont sit beside me in cl when the teacher tells them to nd they are always sayin tat im ugly but when i look at myself i dont see anything wrong with me i think i look really gd lookin . it is startin to put me down alot bcz i am startin to think its true bcz any boyfriend i had dumped me nd the guys tat don't like me say srry but your not my kind of girl r we cud just be friends