Your relationship sounds like it's running it's natural course. The honeymoon phase is over and life settles into a predetermined pattern unless we choose to keep the fires burning brightly.
If there are issues, no matter whose it is, a sober discussion is in order. It takes two people to form a relationship and if the commitment is true, you can both find the answers to soothe your mind. Another option is to take some time away to mull things over and confront those feelings that you keep pushing down. Then return for a heart-to-heart. However you choose to find your answers, may you find your peace . . . hugs