Zero only exists in maths; nothingness cannot exist in the physical, real world.

To get from 1 to 2 you would have to go through an infinite amount of decimal numbers. To get from 1 to zero you would have to do the same, you would never actually reach zero.

I think you've finally answered my question. You seem to believe that the universe is 'everything'. Obviously you do not support the multiple universe theory. Tell me this then, if the universe is expanding, what is it expanding into? And how can infinity expand at all?