expatpud I feel your pain, and YANBU. My DP is a shocking snorer - not much point even moving rooms at night as there is NOWHERE in our 3 bed house where he can't be heard, when in full snort. And it's a truly awful sound - like an effortful death rattle. I honestly don't know how a human makes a noise like that.
Like wildfig's snorer, he didn't take it seriously until I recorded it - on a phone, with video, and a radio playing in the b/g to give some idea of 'scale' of sound. He was embarrassed and annoyed, but I pointed out that me simply saying it was a big problem apparently didn't count, so he'd forced me into 'evidence gathering.'
A mouth thing like this - www.stopsnoring.co.uk/stopsnoring/snoremate.html has helped a lot. Still bad if he lies on his back, but a lot quieter if he's on his side, mouthpiece in. He got it from boots, I think, after I threw a big, sleep deprived teary tantrum and threatened to go and check into a hotel in the middle of the night.... ahem.
He also gets a much better night's sleep with it in. I honestly think a full night's snoring really restricted his breathing, and he was waking tired. Took a bit of getting used to, but he did make the effort.
He also tried an anti-snore spray (did nothing), and an anti-snore pillow (did nothing - it was supposed to alter the angle of his his head, to keep the airways open better, but doesn't work if you move around in sleep).
I did point out that ANY pillow would stop snoring if applied enthusiastically to the snorer's face for long enough....
Good luck.