I feel comfortable being myself in the relationship.

The self you relax into isn't the interesting one. It is the one who sings badly while unloading the dishwasher, repeats the same three opinions, and has a specific way of sighing at the news.

Being loved for the highlights is easy. Being tolerated at your most repetitive is rarer, and it is what comfort actually means.

There is a small cost. The version of you they see is less impressive than the one you take to work. That trade is nearly always worth making.

Consider what you stopped performing, and when. You probably can't pin down the date, which is rather the point.