Growing together doesn't mean growing at the same rate. One person changes career, or faith, or their mind about children, and the other spends a year catching up.
The couples who manage it are not the ones who move in step. They are the ones who keep narrating, saying out loud what is shifting before it hardens into a fact the other person discovers late.
If something in you has been changing quietly this year, the growing-together part isn't the change itself. It is telling them while it is still in progress.