Bro code must be respected, this means that girls are first come first serve, if your bro gets a girl you have to let him keep her even if he's lower status than you, without this we have no society (inb4 "EXCWEEZE ME??? A GIRL *CHOOSES* WHO SHE WANTS 2 B WIT!!!" because lol, you know just as well as I do people can be influenced and swayed, I'm not saying she can't leave, just that it's a dick move for a so called friend to encourage her to abandon you solely for his own benefit.)