My crush isn't talking to me much anymore, why?

Anonymous
He used to text me all the time, and the person who starts the conversation is always 50/50. Suddenly, he starts talking to me less, and it's always me who initiates the conversation. Why? Maybe he lost interest in me, but what should I do? He is my classmate, so I definitely cannot cut off communication with him.
My crush isn't talking to me much anymore, why?
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