Answer:
I am a lunch money thief
Although a human shape I wear Mother I never had; And though no sense nor life I share in finest silks I'm clad. By every miss I'm valued much beloved and highly prized; still my cruel fate is such by boys I am often despised.
In many hall ways you would stand if not with me in hand.
While you were folding a letter you got me. Usually you will do whatever it takes to avoid me but now you can't help but find me.
I fly yet I have no wings. I cry yet I have no eyes. Darkness follows me. Lower light I never see.
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.