TELL ME IF IM WRONG

I BEEN WITH MY DUDE FOR 16 Months .. WE HAD WENT ON A DOUBLE DATE WITH HIS HOMIE AND HIS GIRL , EVERYTHING WAS GOING FINE UNTIL THE GIRL TOLD HER BOYFRIEND I WAS SUPPOSED TO BE DATING HER BROTHER. LITTLE DID SHE KNOW HER BROTHER IS MY COUSIN . SO THE TRUTH CAME OUT . SO ME AND MY DUDE GOT INTO IT BECAUSE HE BELIEVED HIM . MY DUDE TOLD ME HE DONT WANT ME TO TALKing to his friends . He was otp with his homie and wanted to ask the girl a question and I started start flashing because she stared some bs that wasn’t true and all most made me break up with my dude because he believed them . I told him I don’t like her and stop being friendly and he got upset and tryin to hush me because he was on his air pod and they heard everything I said. He was trying to take up for her talking about she only repeated what she heard . I gave him proof and everything that dude was my cousin. He apologize but I really don’t like how he try to handle me .