What does it mean when a guy says something came up after you had plans for a date?

When a guy says something came up after making plans for a date, it typically indicates that an unexpected situation or obligation has arisen, preventing him from following through. This could be genuine, but it might also suggest a lack of interest or commitment if it happens frequently. It's important to consider his overall behavior and communication patterns to gauge his sincerity. If it's a one-time occurrence, it may be worth rescheduling; if it happens often, it could be a red flag.