Talked for 2 years then suddenly stopped?

I'm in high school, about to enter my junior year. This girl I knew texted me everyday for nearly 2 years since middle school, people said she may have even "liked" me though that was never established by her. After fall of this year she just stopped, she usually texted me about nearly anything, but after fall she stopped and when I messaged her it felt more cold and less receptive. She doesn't act differently in school so I assumed she's just busy but nearing the end of the year she still doesn't seem to care much. I'm sure it's a high possiblity she just no longer cares for me but does it seem she did ever like me or may even be willing to message again? It's a lot of speculation, even for people writing so I don't expect direct answers.
Talked for 2 years then suddenly stopped?
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