these guys said you sound insecure, i think i will go with that. If i am you, i would just ignore when your friend is banging on how pretty she is. I always think looks is something no one can be arrogant about, because wow shes pretty but so wat hey she was born that way, it is 95% genes. from what you said, you are quite good looking too, so what is there to worry about? it is not like you are after the same guy or anything. even then, certain guys prefer certain type of girls. I personally detest arrogance, especially about looks. when girls does it, it make them less attractive. so dont worry about it. i know it is harder said than done, but i hope i have reassured you.