My boyfriend smokes indoors and I want him to stop.
What's your reasoning for wanting him to stop smoking indoors?
I don't want anyone to get sick from the secondhand smoke.
I can understand why you are feeling this way. It's rude to smoke around other people. You should be honest with your partner and let him know that his smoking inside bothers you and others.
I wish he'd quit smoking completely, but smoking indoors effects me directly.
Smoking around other people, specifically non-smokers, is disrespectful and no longer socially acceptable. The dangers of second hand smoke are your and it's understandable why you want to tell him to stop. Be firm when it comes to your request, as it's your health that's on the line.