Answer:
I begin and have no end. Eventually I will be the end of all that has begun.
I am used when you jump off a bridge for fun.
You can see me in water, but I never get wet. What am I?
I can run but not walk. Wherever I go thought follows close behind.
In many hall ways you would stand if not with me in hand.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.