Tl;dr : I left my gf after she purposely tried to make me feel jealous with her guy best friend

Ok so to keep it short I went to a late night party with my gf and some friends her bestie was there too . From the very start they both were acting kinda overfriendly it did bugged me but I ignored , we all were sitting in a corner table drinking when my gf hurriedly got up and held her bestie's hand saying let's hit the dance floor , not to lie I'm a lil insecure type and this bothered me but I didn't say anything I was just watching them . She gave me a quick glance and started dancing more what one can say erotically like she was rubbing herself on him and all . Seeing this i got up and calmly went to them and pulled her over saying to her bestie " looks like she's a lil too drunk I should drop her home now " as soon as I finished saying this they both started laughing even my friends sitting in table started laughing , she said " we were just doing a prank on u to see how would u react , oh u r so cute when u r jealous " I also gave a awkward smile . This wasn't the first time her doing such thing just not to this extent and I clearly told her I don't like such childish acts . After the party I dropped her I was kinda waiting for her to apologise but she just left saying gn . Honestly I didn't want to deal with this shit anymore so the next day I called her and broke off explaining what bothered me and blocked her from then on her friend's have been continuously calling me saying I'm being childish while my guy friends are saying I did absolutely right . Idk what to do it's already been a day since we broke up .