Today I was at a store and thought I saw my friend at the checkout, so I was yelling her name over and over and trying to get over to her. It turned out not to be her and everyone was staring. ha ha. My face was so red.
Haha!  That's hilarious from my perspective, but must have been embarrassing for you!  What did you do?
I really was, but I can definitely laugh about myself.  I said, "I'm so sorry, I thought you were my best friend." Kind of joking around with the lady and she laughed.
I happens to all of us at least once in our lives!