Answer:
I grow where no flower grows, where no light touches the walls, up or down, that I don't care, was here before people were.
It is worldwide, but once only a spider could weave one
I have it, I donβt share it. If I share it, I donβt have it. What is it?
It doesn't live within a house, nor does it live without. Most will use it when they come in, and again when they go out.
A tiny bead, like fragile glass, strung along a cord of grass.
I fly to any foreign parts assisted by my spreading wings. My body holds an hundred hearts Nay I will tell you stranger things when I am not in haste I ride and then I mend my pace anon.