Disclaimer: I know all you here are smart and communicate well with your SOs and don't have problems, but just in case someone new and less amazing comes around (doubtful!) I wanted to share something that has really helped me and Mr. Mico. First, we occassionally have "companionship inventory" like dear Rating Pending. This is a safe nice way to bring up topics. Second, I said "Mr. Mico, we need to both contribute to the household chores. I am going to make a chore list and we can decide who does what together." And then I did! We now are mostly split on different chores, and each week it changes so no one is stuck doing the things we both hate. There are some chores I always do and some he always does, and to be perfectly honest I still do more than he does but it is much more even and I feel way less stressed about it.
In sum - make a chore list, decide on it together, and have a set time to talk about things that might be bothering you. That's all. Nothing too extraordinary, but it has really helped me recently.