That’s the thing, addicts have skills, unhealthy skills to mask, manipulate healthy people. But then the addiction eventually rears its ugly head. Be kind to yourself and do not blame yourself or listen to any of the nastiness that spills from their mouths as that’s to wear you down. Next it will be you’re crazy bla bla or blow it out of proportion etc but that’s BS.
A life with a cocaine addict is not one you want and if this is a fairly new relationship then I’d think about you and you’re future and what you want. It’s hell and hard work supporting one! Ultimately it’s down to him tho.