Would you choose your love or your views on drugs?

I love my future husband. I have been with him for almost 8 years. He has stomach problems. One of the only things that helps his pain is weed. I can't stand the stuff. I hate it. I want to scream every time I see the pipe in his hand. (which is ALL the time) He changed his music to raggae and that is all he talks about. I have put up with it for 3 years and dont know how much more i can stand. I want to give him an ultimatum. But is it wrong for me to ask him to give up one of the things that helps him.. He has gone to the doctor but got frustrated because it got him no where. I think he should keep trying but he doesnt want to. He smokes all the time even though his stomach doesnt hurt all the time. He is smoking right now. What do I do? I really really dont want to be around it anymore. It seems that he cares more about weed than me. I cant ever kiss him cuz his breath stinks all the time. I love him so much but I HATE the habit.