You know you changed when old temptations start looking like old mistakes.

Change becomes visible in what stops appealing to you. The thing you used to want, the situation you used to seek out, starts registering as a mistake you already know the shape of, and the pull weakens without needing to be resisted. That shift is a much better indicator of growth than any resolution. It shows up in your reaction rather than your intention.

Notice what has quietly lost its appeal over the last few years and take it as evidence. It usually goes unremarked because nothing dramatic happened. Those are the changes that have actually held.