boyfriend friends

my boyfriends friends are really bitchy and mean towards me because his “best friend” and their group leader (same person) likes him and has for years now and at first i thought it was just normal bitchiness but it’s been a year and they’re all still awful but what’s worse i bought it upto him before and he must’ve said something because now they’re fake nice to me and bitchy when he’s not around,, literally have been with him for a year and nothings changed and i have social anxiety that’s medicated and now going to his house when they’re there gives me so much anxiety i feel like i’m being strangled