Both of us snore ... heck, even my cats snore!
For the most part I've just learned to sleep through it, but sometimes when one of us is particularly bad the other one will jolt the bed a bit to partially wake the snorer up -- that usually puts an end to the snoring. It used to be worse at our old house, which was dustier and generally messier than where we live now (our old roommates were not the tidiest of people), so I'm certain in our case it was allergy-related.
Severe snoring can be a sign of health problems. I know it can be like pulling teeth to get men to see a doctor, but you might suggest your boyfriend get it checked out, just in case. (And if he's snoring and stopping suddenly, followed by a sudden snort or a burst of gasping, he should definitely get that checked out -- that could be sleep apnea.)
My future father-in-law snores fit to shake the house. The only thing my FMIL has been able to do about it has been to sleep in a different room when he's really bad. He's had his snoring checked out and it turns out he's just really loud, so medically there's nothing to be done about it. Fortunately, with both my boyfriend and his sister having moved out of the house, there are plenty of bedrooms for my FMIL to crash in!