What should i do??

lastnight i tried to leave my boyfriend and he jus went crazy..he kept hittin me and he choked me until i ped out....i am so scared of this man...n when i tell him that he has to stop hitting me or im goin to leave he would pull a gun out on me n tell me the only way im leavin is if i die........i dont kno wat to do anymore im jus ready to give up and let him have it his way..