Da big bang

[Moros]

About the size of the universe. I believe could say this:
imagine that the whole universe only consisted out of you (and that you for one reason simply would be able to survive), then the size of the universe would exactly be your bodies size. Let's say you walk (I don't know how you did it but you walked) a bit. The universe still remains as big, it doesn't grow, as you had nothing to move away from. You could say the universe moved with you. However if the universe only consisted out of us two. And you would walk away from me, the universe did expand, cause you had something to move away from. Because your position changed relatively from something else.
However if we wouldn't be able to see each other, and have nothing to relatively orientate us on. Now If I'd walk away from you, did you move? You could say you moved further from the middle of the universe. And I wouldn't even have noticed I moved. Nor did you for that matter.
Now you see it easily gets complicated. even with just the two of us. (And none of us is even female!). Now consider the fact that our universe contains an uncountable amount of 'objects', that space, nor time is linear and that everything is relative. Things become complicated, and it's hard to tell what is moving, what is not. How fast is this moving? How big is the universe?