It Means Nothing
Sometimes, even your boyfriend or girlfriend needs some me-time. It’s not anything personal, it’s just that they need to get out and see the world. Perhaps they’d like to hang out with a friend group, which they’d feel uncomfortable doing if their SO tagged along. This guy somehow convinced his girlfriend to allow him to attend a Halloween party with another woman.
That’s not the worst thing to hear, but what raised a few flags was how he said he was going to dress up in couple’s costumes with here. No harm, right? Fast-forward to today, and he and the costume girl are married. Ouch.