heroin is my doc. i would say that my mind was not "gone", i was myself, and i still felt and thought things--but not as much. there is no person alive who could comfort me the way heroin could. its hard to compete with. i abandoned all my family and friends for it. not because i didn't love them. i did and do, and the pain of elaving them and feeling like such a looser was one more thing to drown with the drug. he may not be lying when he says he would rather have you than the drug and this other girl. but he may not be willing or able to act on that desire. desire i've learned is very far away from intention.
take care of yourself first. you don't have to be cruel to this guy, but he's also not going to do anything good for you while he's using. while that is true you will always always be second. not because he wants it that way but because thats how it is.