Not to be a smart ass but why exactly is he choosing to go through treatments if he refuses to quit smoking? Seems like a waste of time, money and resources. This cancer WILL kill him if he doesn't stop smoking. I have been here long enough on these boards to know that.

It just really makes me mad and saddens me when I have seen so many people on this site die from this disease who did everything and anything they could to fight this.

I seriously don't know what I would do if I was in your position but I certainly would be having some pretty frank discussions with him and his doctors. I just would really have a hard time standing by watching someone I love so much kill themselves.