I need help .... please!!!?

im ridiculously insecure about how i look.... im also going to have a quince soon and were going to have a misa with 4 other girls and i feel like they are going to be compering how i look to the other girls... i hate it!!! i don't know what to do?? i know im going to be the only ugly girl there?? i always feel like crying when i think of what people are going to say about me...