Crush from more than 10 years?

I used to share memes and wishes to my crush at different occasions. He sometimes replied and most of the times didn't respond at all. He was my batchmate. One day I wished him Valentine's and he straight away blocked me. Now I'm having a guilt trip that I made him that much irritated that he has to block me.

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What I should do now?
Crush from more than 10 years?
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