Your BF clearly thinks the world revolves around him.
Someone should tell him its YOUR birthday NOT his.
PS I would pretend I never saw that message, because really, how exactly will a productive convo be born of it?...
If he were to bring it up, I would reply with something snarky, like "Excuse me, I never learned to speak stupid fluently, so I was unsure how to reply".
Buuuuut, that's just me
I hope you make the DECISION to enjoy your birthday celebrations, REGARDLESS of his tantrums.