How do I stop my bf from getting addicted to smoking?

The hard choice here is to issue an ultimatum. Ask him - what do you love more, me or smoking? You only get one.

Smoking is an activity that shortens your life and harms your health. There is a big difference between trying to change someone's habits just because they annoy you, and trying to prevent them from doing self-destructive things. If he can't quit smoking for you, then what hope do the two of you have for a long, happy relationship? There will be much larger decisions that come about than smoking, and if you can't see eye to eye on the small stuff you have no hope on the large stuff.

5 cigarettes a day isn't "rarely" smoking. Rarely smoking is one cigarette when you're out drinking beer with friends on a Friday night. At a pack a day he is addicted, he can't just drop it, it is going to be a process that takes time. If he is going to quit he's going to need your love and support. If not, he doesn't deserve your love and support.

Honey, I'm truly sorry - but its too late - he is an addict at this point. I'm so sorry. :-/ You have to make a decision based on what's best for you. He is not going to quit, not for you, not for his health, not at all. He may or may not do other negative things as well. You can try an ultimatum but those usually just prolong the pain, as he will say yes, and then sneak them. I'm sorry, so sorry - if I were you, I'd be gone.

Hermes

He is addicted to the pot, and there is nothing you can do. The very best thing that you can do for him is to give him a consequence to suffer for his actions. If you tolerate his behavior, it will never change. There is nothing to stop him. Give him a reason to stop and leave him. Avoid all contact and let him know that will not tolerate drugs around you or your child, that is not the life you choose to live and if he wants to do things like that, then good luck to him. You have an obligation to your child to protect him/her from things like this and as a parent, it is your responsibility to do that. In the event that he gets busted and you have drugs in your home, you could have your child taken from you, you will both go to jail and it will have been your fault as well as his ... because you tolerate it. Leave him and have no contact until such time as he is sober and free from any drugs...by then you will have found a more mature boyfriend anyway.

A good man would quit for his woman !

Get rid of him.

A woman must have a man who has his act together and she should not waste her time on others. Men are like most poker hands...you need to drop the rather bad ones quickly or they'll get you into trouble if you continue. And I don't like "boyfriends" in any event, but rather husbands or those who are going that direction. And to mention one more thing - keep your legs closed.