Should I congratulate my crush with his birthday?

Livelifeeee
Hi,

I don't know if i should congratulate my longtime crush for his birthday, just a congratulation on his post that it is his birthday. We never really got to know each other but definitely know who the other is, but we aren't on the same school anymore.

Thanks for willing to help me out! :)
Updates
+1 y
Should I write it as a reaction on his post or write it to him in a private message?😅
Should I congratulate my crush with his birthday?
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