Answer:
I am a precious little thing, dancing and eating all the time. Watch me from a distance, so you can feel my warm and gentle love. But don't come to close or my next meal you could be!
I have a tongue, but do not talk. I follow close, but neither run nor walk. Coupled and hitched, but never married. You couldn't bear the load I've carried.
What is so fragile that saying its name breaks it?
Something wholly unreal, yet seems real to I. Think my friend, tell me where does it lie?
I hide but my head is outside.