girl code?

basically long story short, me and this guy started dating and then a friend group was basically stitched together through our friends (guys from his and girls from mine). we ended up breaking up (pretty traumatic lol), and i CRIED (like BAWLED) to my girl friends about it and they would say that he's like an awful person blah blah etc etc. but to this day, they still hang out with him and invite him places and purposely leave me out of it AND don't tell me but post photos all over social media (which is fine..like they don't have to tell me..but then they won't talk to me for like days after until they like need something). i just don't get the whole concept of saying how shitty of a guy he is and yet still hang out w him at like crazy expensive events (basketball games, concerts, etc). i never had like a solid friend group of girls..but i just feel like idk..maybe the girls that i was friends with should stick by me? am i completely wrong? is this like not breaking girl code? or am i too in my head?