Demi Lovato and Wilmer Valderrama have been dating for quite some time now and they've remained together despite all the trials that they have faced including the singer's stint in the rehab.
During an interview with ET, the 35-year-old actor revealed their relationship secret and it's pretty simple.
"You know, we've been best friends for about six years," Valderrama said. "We haven't necessarily been dating for six years, but we have six years of friendship, and it's been... it's been beautiful."
"All I did was love her exactly when she needed me to love her. And you know, we just stay honest. That's it."
To sum it all up, friendship, love and honesty are the three factors for a successful relationship based on the experience of Demi Lovato and Wilmer Valderrama. A week ago, ET also got a chance to chat with the 23-year-old singer who started dating at the age of 18.
"Everyone thinks it's our six-year anniversary. We met six years ago!" Lovato explained about the Instagram photo she posted which she captioned with the number "6."
The "Cool for the Summer" hitmaker also shared their relationship timeline on Instagram by posting images of the couple per year - from 2010 to 2016. Demi Lovato and Wilmer Valderrama had to face criticisms from other people because of their 12-year age gap. However, they proved to everyone that age doesn't matter when it comes to love.
"He had some hesitations [initially]," she confessed. "Once I got older, we could be together. He's my best friend."
When she said they could be together, could that mean that they are planning to move in together or better yet get married? There have been rumors coming out that the Demi Lovato and Wilmer Valderrama would get engaged this year because both have openly talked about marriage.
"I am very, very in love with him," she told ET last year. "I think -- we will probably wait a little bit longer, but -- if he asked me tomorrow I would say yes."