Aside from inanimate things that keep me alive like my inhalers for my asthma and my migraine medicines, I would have to say, without a doubt, Mr Moo. He is my rock, my light, my everything. He loves me unconditionally, takes care of me, protects me, comforts me, makes me laugh, puts up with me, works hard to put a roof over our heads and food on our table... The list just goes on and on. I would be lost without him.