But now he's putting those rumours to rest.
As you know, Ariana Grande's new song "No Tears Left To Cry" has recently dropped, and Kevin's response to the absolutely amazing song was also an admission of his sexuality.
"#NoTearsLeftToCry is gayer than me and I ACCEPT. Ty @ArianaGrande," he wrote.
It comes less than a week after he posted an adorable photo of himself and ~rumoured~ boyfriend Austin McKenzie cuddling on IG.
SO CUTE.
Of course, fans of Kevin have rallied around him for support.
Congrats Kevin!