To smoke or not to smoke

Is it the job of a smoker to support a friend or family member, who is trying to give up the bad habit, by stopping smoking themselves when around them? What do you do if you are a smoker living with someone who is trying to quit?
I gave up smoking last year for roughly 1o months.... and let me tell you, I have never felt so good! The entire time I was completely baffled as to why I didnt quit sooner. So...This is the bit that will really confuse you, For some stupid reason I started again just before christmas. I now know from experience that what they say is true ''just one cigarette and you're hooked again''! Worse still, this time around it seems to be even harder to stop. I have been battling with it for weeks and weeks and I will find every excuse under the sun to have one, or to even just have one drag....any excuse! This last week I have been doing really well in stopping again....phew! I get a craving every evening and it makes me entire body slowly tense up from head to toe and my tummy ends up in knots. But i get past it, Like a trooper, I keep on going! (Really deep inside, I feel like a steam train grafting my botty off red with anger and tension and smoke coming out of my ears, I wish!). But you find things to do, and keep those restless fingers busy and your mind active.
I have now also learned that the last thing you want to hear as a stopping smoking newby is these words ''would you mind terribly if I just had a quick cigarette!''. As I have just experienced with my mumsy...who I live with...who has been trying to stop smoking herself for two reasons, one for cholestoral, and the other more in aid of me trying my hardest to quit! My heart instantly sank...my body started to tense head to toe and images were going around my head of feeling instantly relaxed after a lovely ciggy...and in my mind I was screaming ''OF COURSE I MIND,IV COME THIS FAR ONLY FOR YOU TO RUIN IT NOW!!!'' and then it hit me... Is it actually down to other people to help you quit? They say you have to remove yourself from all things to do with the thing you are trying to give up as a way to make it harder to fail....But what if you live with a person who has the same addiction , what then? Is it up to them to help you?
Me being the addict trying to quit I find it impossible to answer this question! Naturally I feel I should get the help I need as it is actually, in the long run, a matter of health and sometimes life and death! I know I would do it for someone else. But at the same time its up to each individual when and where they want to do things.
Then I get annoyed I have written a entire blog about something I wish I didnt even give any thought for! If you are a non smoker, count yourself lucky! When I didnt smoke it was like bliss not having to think about a bad habit all the time!