What！Who is the groom？

At my wedding, my best man was dressed more like the groom than I was, exchanging deep, meaningful glances with my bride. Watching them, I suddenly realized who the real fool was. If anyone wants to play this part, they can have it. I excused myself, saying I needed to go to the restroom, but instead, I scaled the wall and ran out of the venue. Tossing aside the bouquet, I pulled out my phone and scrolled to a long-forgotten number. "Get a plane ready for me. I'm heading to Las Vegas." The voice on the other end responded crisply, "Yes, sir."