There are a lot of reasons to be jealous of Zach LaVine -- the dude's rich, he's freakishly athletic, and most importantly ... he's got a smokin' hot girlfriend.
TMZ Sports met up with LaVine and girlfriend Hunter Mar outside TAO in L.A. Thursday night, giving us the perfect opportunity to showcase his high school sweetheart.
20-year-old Mar is an athlete herself -- she played college soccer at Seattle U. -- and has been tied to LaVine since their days in Washington.
Oh, and by the way ... we talked to LaVine about the car Derek Fisher wrecked in his DUI accident being registered to Matt Barnes ... that's cool, too.