How comfortable is too comfortable? i would like advice on living with your partner?

me and my BF of a year moved in together yesterday, well i moved in to his familys house. we had a long distance relationship so i got a job and moved up. i know this may sounds stupid and i may be reading too much into this but i have never done anything like this before and im nervous. i like to ay around in a hoodie and pyjamas, take out my contact lenses and put on my glasses in the evenings when i come home from work and im completely comfortable walking around like i would in my own home. but i worry he might stop fancying me a bit. i fancy him a lot and no matter how bad he looks or farts i still find him attractive but im worried he might not feel the same. how comfortable is too comfortable? what are the dos and donts?