Answer:
I can run but not walk. Wherever I go, thought follows close behind. What am I?
I have feet on my head
I will go within you and destroy you. Only because you wanted me too
My first is a heir; My second's a snare; my whole is the offspring of fancy; which I sent out of play upon Valentine's day As a token of love to my Nancy.
You can see me in water, but I never get wet. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.