I just can't resist commenting on this...
So if there's karma in this world, the girl that stood up the MC now weighs in around 250 lbs., has had 5 or 6 kids, has a drinking problem, chain smokes, and is now married to Chad. The MC could then say, "Thank God I dodged that bullet!"
But since this game really likes to kick the MC when he's down, she's probably now supermodel gorgeous, and on the day of the prom was in an accident that broke her phone and left her drugged up in the hospital. She found out later that the MC knocked up another girl the night of the prom, then had an accident while driving under the influence naked, and is saying to herself..."Thank God I dodged that bullet!"
Take your pick...or come up with an alternative, I'm sure there are plenty of options.