Why would he not reach out?

After months of unspoken tension I decided to give this guy a note telling him I’m interested in him. The note had a cute message and my number but he never reached out. His reaction was the best. He said aw thank you and gave me a smile that reached his eyes. He seemed genuinely happy and he doesn’t smile a lot either. So what gives? Was it all in my head?

Why would he not reach out?
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