Naturally, men want to avoid dull conversations and are drawn to intelligent women who can partake in stimulating, interesting talk and activities.
Trade in a bar for a museum, a movie for horseback riding, or a concert for mini golf, depending on your “intelligence” as a couple.
If you really want to meet him or reschedule, tell him.
The bottom line is a man values a woman who will consistently show up and be there for him.
He might give you another chance, but he will be evaluating if he should give you the benefit of the doubt and how reliable you actually are.
If you do need to cancel, communicate why and give him as much notice as possible.