Nick Jonas And Olivia Culpo Are Definitely Together, And We Are Definitely WEEPING (PHOTOS)

Nick Jonas is officially dating Olivia Culpo! We are super heart-broken.

"Oh, cute, all of the Jonas Brothers are taken," he lied through his teeth.

Well, it's official! Nick Jonas is definitely dating Miss Universe 2012, Olivia Culpo -- aka the young woman he was seen kissing at the U.S. Open last week. As you can see in the above pic taken at Us Weekly's Most Stylish New Yorkers event that the "First Time" singer posted to his Instagram, all three Jonas Brothers are taken! Joe has Blanda Eggenschwiler, Kevin's got his wife, Danielle, and now #Nolivia is just, like, a fact of life. If you need me, I'll be holding my breath until I pass out because I'M MAD.

Check out more heartbreaking photos of Nick Jonas and Olivia Culpo after the jump.

We guess we should've seen it coming -- I mean, the youngest JoBro did Insta a group shot from the tennis event with his arm around Olivia, along with the caption "US Open was so fun. Good people. Good tennis." But, "good people" doesn't necessarily mean dating! My DOG is "good people," and we are decidedly NOT dating. #RumorsByLindsayLohan #NoButSeriouslyMyDogIsGreat #CanIGiveHimYourNumber

Nick Jonas and Olivia Culpo are definitely a thing, and we are definitely upset.

We get it, Olivia, YOU WIN.

Confirming the news on her own Instagram handle, Olivia posted this couple's photo, captioned with "So serious <3 @nickjonas." We would call the picture adorable, fit for a Christmas card even, but we just can't stop hearing Etta James' "All I Could Do Was Cry" ringing in our heads. (The Beyoncé version from "Cadillac Records," obvs.)

Photo credit: Nick Jonas' Instagram, Olivia Culpo's Instagram