Confused please help

my bf is 48 and im 26 we been dating 2 yrs i know he is the man who i love but he says i dont love at all and that im heartless to those who love me, he is so sure im doing him wrong in all ways and im not i have a big mouth on me but i tell him i dont really mean it but he says some pretty harsh things to me too, truly i know he loves me or at least did . its been getting worse by day we argue and he makes me feel so bad like its all me i do feel it harder to make up because he blames me for all of it, i really just want to be close to him but he gets so paranoid with me like im hiding something so i know i feel that from him but he denies it, and i dont know what to do he starting to hate me and he claimes that just being around me makes his stomach turn to knots and he gets all weird on me he says im causing him to bad health from stress and unhappyness, WHAT DO I DO IF I CANT LIVE WITHOUT THIS MAN