What dating advice can you give for a non-smoker who is dating a smoker?

Second hand smoke: I would request they not smoke in your presence because of the effect of second hand smoke impacts negatively on your health. The health benefits and risks of smoking can be explained to them overtime and hopefully they might want to improve their health on their own.

Make the smoker stop: Or get help to stop or find someone else or if you are sexually active with that person- deny sex if he won't stop.