Aaron Rodgers is turning 36 today -- and his girlfriend Danica Patrick just hit him with a super lovey-dovey note, thanking the universe for making him.
"Happy birthday to my best friend and favorite person in the world," Danica posted on IG ... "You are the one I want to tell my best and worst days to first."
Here's where things gets spiritual ... followed by an L-bomb.
"I am so grateful the universe made you!!! The star dust started it all, but you have done nothing but make it better every year of your life.