wishing happy bday to friend/oldFWB/coworker

alright sooo i need some help wishing a guy a happy birthday

we met on campus in Sept 2018 and got really close, eventually became FWB, then became coworkers as of summer 2019

we no longer have class together or hookup but we still work together each summer & catch up every once in a while throughout the year

he deserves more than a simple hbd, so how do i wish him a friendly happy birthday without simply saying just happy birthday?

i was gonna post a funny video of him on my instagram story, saying “happy birthday to the 🐐, thanks for all the laughs”— but i don’t wanna seem too friendly or like i wanna get back together as a FWB

any ideas?