How to avoid cigarette smell?

Sam

My boyfriend smokes and has been addicted for a few years, he’ll go outside to smoke every 30 minutes and when he comes back in it’s a thick stench of smoke. I’m really sensitive to smells so it gives me headaches and bothers me a lot.

We don’t really have a lot of room where we stay so it’s not like I can just go away and avoid him completely all the time.

Is there anything he or I can do to avoid him smelling like that when he smokes? Besides quitting obviously because I’m talking short term fix