Sometimes, it seems hard to remember that Demi Lovato and Wilmer Valderrama are even dating, but on the third anniversary of the "Really Don't Care" singer's sobriety, the notoriously private couple have declared their love for each other in a big way. Well, on Instagram, at least...

On Lovato's third sober anniversary, they shared a pair of loving messages, with Lovato even claiming that she would be dead without her boyfriend of four years.

Alongside a black and white photo of the duo kissing, Lovato shared a sweet and open message to her followers, thanking Valderrama for his support. “He's loved me the way I never thought I deserved to be loved and with this day marking my 3rd year sober... After sharing my ups, putting up with my downs and supporting my recovery... he still never takes credit and I want the world to know how incredible his soul is. I really wouldn't be alive today without him,” she wrote.

For his own part, Valderrama shared in Lovato’s sober birthday, congratulating her strength.

Lovato has been insistent on staying on the sober path ever since entering rehab in 2012. The former Disney starlet has been open about her struggles with bipolar disorder, drug addiction and eating disorders.

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