(Unless you don't care that they are commiting suicide and will keep your concerns to yourself or you are just looking for a short term/fling) But if Long Term is the case, why even bother being with someone like this? I'm a doctor, and I've seen the negative results of addiction (smoking in this case) to the person involved and family and friends.
One common comment made to addicts is, "Why should I care about your health if you won't? My fiance was addicted to chewing tobacco when I met him and because we didn't start out dating, I didn't care (although still it repulsed me), but when we finally decided to date, I pretty much told him it would be an issue for me to date someone who smoked, did tobacco, etc.
Every place we would go eat the first thing she would ask is if there was outside seating so she could smoke.
She could not even sit through a 2 hour movie without her needing a "smoke break" And to hear her constant cough and hear her deep voice all reafirmed that this was taking a huge toll on her health.
If only just a friend, I would be concerned, let alone someone who is in love with her. A typical smoker will die ~15 years earlier than normal?
She was a chain smoker who smoked about 3 packs a day.
As I was getting to know her and I started develop feelings for her I felt the need to mention to her how bad it was that she smoked that much.
Of course I knew that she did this years before she met me and I had no right to preach and make someone do something they did not want to do. I imagine if she smoked half a pack a day it would of been a lot easier to deal with, but if every time we went outside and at every 30 min incrament she had to light up, you can see how this was a problem for a non smoker dating her!
From the stench of Tabacco on their skin, hair and clothes, wrinkled skin, yellow fingernails, deep hoarse voice and sickening "smokers" cough, I was repulsed.
Over the years I became complacient as I was trying to meet people and date. Over the past few years I briefly dated a few women who smoked and it was not too bad to deal with.