2. Be brave and say hello.
“If your boyfriend acts a little awkward, you’ll know right away that something is up.” In this approach, you walk right up to your boyfriend and say hello to the girl he’s with. There’s a high probability that the girl is a coworker or acquaintance, so the key is to act natural and casually introduce yourself as his girlfriend. If you notice him acting strange, it’s probably better to avoid interrogating him on the spot.