"Something or someone you couldn't live without because you have tried living without it"
So there are obvious things I couldn't live without like air, water, food, etc. but I have not tried living without these things.
I don't think there is a real answer to this question. I think that human beings are strong enough to live without something they love (minus basic needs.) I thought that living a "normal" life after my dad died was going to be impossible, but I figured it out. I am living without my dad being alive...its not my first choice situation, but I can do it.
This question makes me think about people that have physical disabilities. I wrote my thesis on mixed ability dance, and focused specifically on dance companies that had dancers on legs and dancers on wheels. Throughout my research I came across many people with various disabilities who loved to dance and so they did. I wonder how they felt (if they remember) when they first met with their disability? I wonder if they thought that life was not worth living without my leg/arm/etc.? It makes me realize that people can live without things and still make it through life and not just barely.
I am going to say that there is nothing and no one that I couldn't live without. Again, there are things and people that I would be extremely distraught about if I lost, but I know I could make it. My yoga teacher told a story last night and the moral seems to fit right now...Its the struggles in life that let us know how strong we really are. Peace to all who survive the struggles.