I CANT STAND HIS BESTFRIEND

RANT TIME! Lol I absolutely can’t stand my boyfriends bestfriend. He is a guy and is extremely clingy to my boyfriend. Will take facetime screenshots and post them all over social media on when hes coming home ( my bf is in the military) he’s told me I’m “taking him away” from him and I’m over it. Don’t want to tell my boyfriend to not be friends with him but I’m sooo over itttttt ugh HELP