Brooks Koepka knows how to kick his GF Jena Sims' birthday month off right ... by bringing her along to his golf tourney in Mexico -- and yes, there's plenty of ud83dudd25.
The #12-ranked golfer in the world had an early exit from the Mayakoba Classic in Playa del Carmen last week ... but don't worry, he had his lady right by his side to cheer him up.
The couple has been together for years and always fill their social media with solid content when they take romantic getaways -- and this one is no different
Jena posted a shot of feeding grapes to her man while wearing a black bikini on Monday .