Answer:
I fly away as soon as you set me loose. People around you may slowly move away once they sense my presence.
Curtail me thrice I am a youth; behead me once a snake; complete I'm often used in truth when certain steps you'd take.
People make me, save me, change me, and raise me. What am I?
I am between earth and heaven. What am I?
I am easy to waste and unstoppable. What am I?
I break away from my pack. I create holes in my victims. I can travel for miles and then disappear. I am part of a dying breed. What am I?