Big Sean and Jhené Aiko have heated up the music world with their popular Tweny88 collaboration project, but they also appear to be heating up in other ways, too....

While the couple promise to be "just friends," we can't help but notice how much time they've been spending together lately. The rapper—who previously dated Ariana Grande—is currently on tour with Rihanna in Europe, and Jhené has been traveling around with him, taking numerous Instagram photos and Snapchats together throughout their trips.

It makes sense the singer would travel with Big Sean, considering their new collaborations. Not to mention, things get even more complicated knowing that Jhené was married to Dot Da Genius, but the pair's pictures seem to speak a thousand words...

Check them out below and decide for yourself:

Big Sean, Jhene Aiko

Imeh Akpanudosen/WireImage

The couple looked cozy during a Grammy's after-party in February. Jhené cuddled up close to Sean as he wrapped his arm around her waist.

Big Sean, Jhene Aiko

Johnny Nunez/WireImage

Jhené joined the rapper for his pre-birthday bash at Wolgang Puck on March 25, posing cheek-to-cheek for a photo opp.

Happy Birthday Sean Don ???? You are the BEST! Welcome to 28 ?? #itshisbirthdayYALL #yeauh! @bigsean

A photo posted by Efuru (@jheneaiko) on

The first photo Jhené ever posted of Big Sean was on his birthday on March 28. She wrote, "Happy Birthday Sean Don," including a couple heart emojis and adding, "You are the BEST! Welcome to 28 #itshisbirthdayYALL #yeauh! @bigsean." 

Big Sean, Jhene Aiko

Noel Vasquez/GC Images

The pair attended a basketball game between the Boston Celtics and the Los Angeles Clippers on the rapper's birthday, looking cozy sitting court side. Sean wasn't afraid to keep his arms around her while photogs snapped away.

Big Sean, Jhene Aiko

Kevin Mazur/Getty Images for iHeartRadio / Turner

The duo sat side-by-side at the iHeartRadio Music Awards at The Forum in April.

?? @anwander for @flauntmagazine

A photo posted by BIGSEAN (@bigsean) on

Jhené and Sean didn't hold anything back for their FLAUNT magazine photo shoot in support of their Twenty88 project earlier this year, even going as far as kissing for the sexy spread.

A photo posted by Efuru (@jheneaiko) on

The duo attended the 2016 Coachella Music Festival together, looking happier than ever. Jhené captioned this photo, writing, "When you realize how perfect everything is, you will tilt your head back and laugh at the sky."

A photo posted by Efuru (@jheneaiko) on

They both used this photo to promote their Twenty88 performance on The Late Show in May, and we can't help but notice how sweetly Sean is holding Jhené's hand.

A photo posted by Efuru (@jheneaiko) on

The singer shared this picture at the end of May, holding Sean close as they jetted off together. She simply wrote, "on the way."

During their performance together at the Powerhouse concert in early June, the pair kissed several times on stage, and it didn't appear to be an act. The audience went wild while watching.

Big Sean, Jhene Aiko

Kevin Mazur/Getty Images for iHeartRadio / Turner

Jhené and Big Sean stayed close while posing for photos at Moschino's runway show in June, even going as far as matching with their bright orange accents. The rapper held the singer close with his arm low on her waist.

A photo posted by Efuru (@jheneaiko) on

Holding hands, the duo shot this cute and couple-y photo recently. Jhené captioned the pic, "i got your back like chiroprac," alongside a heart emoji.

#TBT ???? = @twenty88

A photo posted by BIGSEAN (@bigsean) on

The rapper threw it back to this photo from earlier this year, looking very, very close.

Big Sean and Jhené seemed to confirm things even more by making a cameo together in PartyNextDoor's "Come and See Me" music video, which premiered in late June.

@twenty88 4th of July from Sweden ????

A photo posted by BIGSEAN (@bigsean) on

While touring in Sweden, Sean shared this photo with his gal-pal on July 4th.

A photo posted by BIGSEAN (@bigsean) on

He also posted this photo from Sweden along with the caption, "Tag team."

A photo posted by Efuru (@jheneaiko) on

They seemed to tour the country a bit and enjoyed some cold beverages at what appears to be an ice lounge, smiling as they cheersed to one another.

A photo posted by BIGSEAN (@bigsean) on

The duo has even started wearing matching ensembles, like these hats that read "Mom" and "Dad." If that's not couple-y...we don't know what is!

So now you tell us: are they just friends? Sound off in the comments below!

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