I stopped so I could study for Medicine. It took fourteen and a half hours a week, and I just don't have that time in Upper High, so it was either medicine or dancing. I chose medicine because in ballet you have to be brilliant to get somewhere. I am reasonably good, but far from brilliant when compared to somewhere else in the world, so I chose to study med.
Yes indeed, 14.5 h a week that is quite a lot! But I can totally understand your choice. However would it no option to reduce the amount of weekly hours and treat it more like a hobby before stopping completely?