Favoritism??

hey everyone my son is 5.5 months and my bfs brother had his baby a month in a half after me.. well ever since this baby has been born his family dont share any pics for the family they dont see to see pics of him all they do is like it.. but they share pics of this baby left and right. they see the other baby every day almost being they live 2 min away and we live 15. they never take pics of my baby never share pics never comment anything !!! but this baby? they do it alll the time my bf said " he dnt see it "but hes the type to not pay attention.. its like my son isnt important and everyone i tell they say its favortism... advice? please no bashing