You may be disappointed in yourself but today is a new day and that's in your past!!!
You did so great getting rid of the rest of the chocolates, logging in here to talk about it and move on from it, plus the awesome NSV of your sweet boyfriend's comments!!!
Slip-ups like that happen to all of us in one way or another, we have all been there/done that. Using the support of this forum and learning how to deal with these temptations in the future is half the battle so I say, YAY YOU!!!
You are so much more than that chocolate or those few extra calories. No need to be so hard on yourself, you moved on from it.