As long as she made solid plans to meet you on an alternate date, she really wants to see you.
If she postponed the date without making solid plans to meet you on an alternate date, she was just being polite and isn’t interested in seeing you.
Women postpone dates all the time.
Sometimes, there are valid reasons for the postponement, and other times, she is looking for an easy way out of having to go out on a date with you.