You have experienced a definate turning point in your training. At a point like this you re-evaluate how much you really want to continue. Those who have the heart of a black belt pick themselves up and keep going. And there are no maximum time limits to spend in any one grade. We all proceed at our own speed. I was a green belt for two years. Many of us have reasons why it takes us longer to attain a grade or why we work so much harder than our classmates to get there. It is our heart that makes the difference.