Credit: Demi Lovato/Twitter

Demi Lovato is famously open when it comes to her struggles with addiction and self harm, but the “Heart Attack” singer closes the book when it comes to her personal life — as does her rumored boyfriend Wilmer Valderrama. However, Demi shared an intimate pic of herself on January 30 with the former That 70s Show star that seems to be shedding some “neon light” onto their relationship.

"To the funniest, most inspiring, incredible man I know.. @WValderrama,” she wrote, alongside the adorable pic. “Thank you for helping me get through my darkest moments.. You truly are a light to this world and to my life.. Happy Birthday!!!"

Wilmer, who just turned 34 years old, responded to Demi’s sweet message with an equally lovey-dovey reply. “Who needs presents when the gift of you is real to us all,” he gushed. “Thank you for the blessing of knowing you."

Whether these two are just good friends these days or something more (rumors of an engagement were swirling in December but are as yet unconfirmed), it’s clear these two hold each other in the highest esteem. And, we have to say, they make a cute couple — platonic or otherwise.

What do you think — is this Demi’s way of coming out about her relationship with Wilmer, or just two dear friends sharing some mutual appreciation?

Sources: Demi Lovato on Twitter, Wilmer Valderrama on Twitter