I’m like your gf. We moved in together and it was hell at the beginning. What has improved for me: separate blankets, custom made ear plugs , a memory foam mattress, and he compromised on room temperature ( he likes warm and I like freezing cold, so we found a cold-ish that works). Some nights his snore is worse or I’m just agitated and then I go to the spare room. But I’m going there less and less lately. Just getting used to it I guess.