key to his heart..

you set that small piece small piece of metal into my hand, and i barely even remember the words that followed. my mind blanked at first, but then began to race. the small object held so much meaning within it. you'd willfully handed it over. it was in my posession now, and i was the one responsible.
you trusted me, and i barely even trust myself with it, considering every other time i've handed it back leaving a hole, or scar.i can't end up leaving you the same.
typically it's not just an item given, but exchanged, and maybe without realizing it, i've handed you mine too.
i know my hearts a hard one to hold, impossible basically.. are you absolutely sure about this?