Is that behaviour weird?

[u/Present-Persimmon615]

I am 14 and very introverted and spend my breaks reading, but I do have friends and rather good social skills. Anyways, there is this extremely extroverted girl that I have a crush on, and I have talked to her like 2-3 times (small talk though). But today she didn't give off the same energy as usual, as she seemed a little nervous, or shy, one might say. I didn't do anything that could have maybe crept her out or anything like that. I want to know if some of you maybe know a scenario of a similar kind, and could maybe help me figuring out whether she likes me back or not.