Describe A Cherished, Lost Possession

My right Beverly Feldman shoe that i wore to Winter Formal with Alex Lowell in 2004. It's been missing since about 2005, and i have no idea where it went. The last place i saw it was in the backseat of my car and i think somebody must've accidentally dropped it outside the door when i was giving them a ride. The worst part is is that i've still got the right one to remind me. Also, i've still got my mom to remind me.