Is she still interested?

Me and this girl had been talking when we would see each other around school. She seemed interested in me and would always come up and initiate the conversation. We had a long conversation at a bar the night before our school went on break and I wanted to ask her out/get her number but I never did. We just came back from our 1 month long break but this girl doesn’t seem as friendly to me and is quiet around me and no longer starts conversations. Is she just not interested anymore?
Is she still interested?
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