Breathe Right strips work just fine for most people. If they didn't work for you, try wearing them on the OUTSIDE of your nose!! :laugh:
OP, does your bf normally sleep on his side, or on his back? What about before you two were sharing a bed? If he's always been an on the back sleeper, it's likely he's always been a snorer, and training him to sleep on his side might be a chore. If he normally slept on his side in the past, and is just now sleeping on his back.......could it be having another person in the bed with him is changing his sleep habits? Not sure how much you two snuggle (and it's none of my business), but one of those full length body pillows might help him, as it will allow him a more comfortable position on his side to sleep in.
If the snoring continues, you might consider talking to a doctor about sleep apnea, though most people I've known that have been diagnosed with it said the doctor told them it was more due to their being overweight.
The nose strips worked well for me, especially when I went home after my dad passed away, and wasn't competing against him for loudness (which meant I was keeping everyone awake with my snoring). It does take up to a week of using them to retrain your body to breathe through the nose (as snoring happens oftentimes when you can't breathe through your nose, and the mouth pops open to continue life......and leads to snoring). Took about 3 days, and even now I'll occasionally have nights where I'll wake up with dry mouth (from snoring), but can fall back asleep on my side again and be okay. If your bf has problems with being stuffed up, you might try the BR strips with menthol, which might clear out any sinus blockage a bit, and/or try using something at night that will dry out the sinuses a little.
Of course, a drink of wine, or a nice dosing of antihistamine, before bed, will do wonders to knock his ass out too!!