Your married, but your not in love with you spouse, you've been with them for a number of years, in the beginning of your relationship you were aware there was a chance they could someday become very ill with a disease there is no treatment or cure for, they could live a long time with this illness but it will affect there mental status and eventually their physical capabilities. They begin showing symptoms of the illness and have no one to care for them except you. Naturally you care about their well being but you no longer love them. Do you stay with them and live out your committment, or leave and try to make a new life for yourself?