Answer:
I always have to work with something in my eye.
I roam through the lands hoping to rescue my love. I search high and low and will stomp on you if you get in my way!
A necessity to some a treasure to many I'm best enjoyed among pleasant company. Some like me hot some like me cold. Some prefer mild some like me bold.
You find me behind the stars; or in a sixth seventh or third. It takes something round a computer and me to make pie. I am bigger than anything you can think of.
I am easy to waste and unstoppable
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?