My Husband Hasn't Fulfilled His Promise After 9 years.....?

Okay we both used to smoke cigarettes and then we decided to have a baby but both knew we couldn't continue smoking for mine and the baby's health. He said he would quit too in all fairness but he didn't. In fact he would actually try to get me to smoke when I was pregnant just so I would be his smoking buddy. Well this has become a larger issue with me now since he is basically smoking our future away. I really do not want to be alone as an old woman just because he wanted to keep smoking. He knows this is my fear and just continues to do it. He will say he quit but then he just lies about it. It has been 9 years now and I am still smoke free and he still smokes and my heart breaks knowing my future will be spent alone and in some of the loneliest years of my life too. Should I trade him in once our daughter is raised for a husband who will be there with me in our golden years or stay by his side and nurse him through his early death from lung cancer and die alone?