Why did this guy stop glancing at me for good when he found out that I was shy?

he used to watch me for a year (I’m sitting in the back most of the times) from afar but after he saw me being a bit awkward/shy with someone else he completely stopped and started focusing on another girl. Why and what does that tell about him?

Why did this guy stop glancing at me for good when he found out that I was shy?
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