Life is supposed to change us. Pain is supposed to teach. Failure is supposed to refine. Every year you should peel something away or add something deeper. If you didn't grow in the time passed and you feel untouched by it, then you’ve either been asleep at the wheel, or too afraid to confront the mirror when it started showing something uncomfortable.
Growth doesn’t always come with applause. Sometimes it comes in silence, in dark nights, in choices nobody understands but you. But if you’ve lived 5, 10, 15 years and stayed the same, you didn’t survive the time you hid from it. Personally I’d rather be bruised by growth than embalmed by stagnation.