Would a girl really cancel a date because she is nervous?

I had a great first date with this girl. But then she cancelled the second date on me twice in a row, one of which she asked me on. I'm frustrated and thinking I should move on. I talked to another girl about it and the other girl said she thinks she is nervous and has dating jitters.

Is that a real thing? How am I supposed to figure it out and what am I supposed to do?
Would a girl really cancel a date because she is nervous?
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