While I would say cut him some slack as it already sucks to be a re-app, OP you do have a more difficult time than others. You need to convince the adcom that you are truly sure that you want and can become a physician now. I would come out point blank, perhaps saying you thought you were sure, but only to realize now that your conviction has not been firm, as something had happened last year. Even though you said you sounded firm on your essay, did it really come across as so to the adcom when you supposedly wrote it while hesitant? Show strong and genuine motivation and commitment that you are in for this for real this time. Best way is to also complete everything early to demonstrate eagerness. Good luck.
P.S. shopsteward is right about your parents. You are a grown adult, and cannot hold your parents responsible for your doings. Own up to it and take control.