DEMI LOVATO, WILMER VALDERRAMA ENGAGED SOON? ADORABLE COUPLE GETS SERIOUS (PICTURES)

Demi Lovato and Wilmer Valderrama just celebrated their sixth anniversary by going on a romantic vacation! There's no denying their relationship is serious, so will they get engaged soon?

Will Demi Lovato and Wilmer Valderrama get engaged soon? The adorable couple just celebrated their six-year anniversary on Sunday, and it’s clear they're smitten.

Lovato, 23, and Valderrama, 35, celebrated their anniversary by going on a romantic snow-filled vacation. Lovato even posted sweet photos of them playing in the snow and cuddling in bed together. Lovato also posted an adorable collage of her and her boyfriend’s best moments from the last six years.

Demi Lovato posted a sweet collage of her and Wilmer Valderrama's relationship from the last six years.

Lovato and Valderrama started dating six years ago right before Lovato went to rehab. And their relationship got very serious fast. Valderrama has always been very supportive of his girlfriend. She constantly talks about how Valderrama was there for her as she struggled with depression, an eating disorder, body issues, and substance abuse.

“I wish I could put into words how grateful I am for this man right here,” Lovato wrote on Instagram while celebrating her third year of sobriety back in March.

“But my love has grown to a level that words could never possibly express how much this man completes me. 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. I love you Wilmer.”

Demi Lovato posted this photo in honor of her and Wilmer Valderrama's sixth anniversary.

At this point, it’s not a matter of if Lovato and Valderrama will get engaged. It's a matter of when. In fact, back in July, Lovato said she would say yes if her boyfriend proposed.

“I’m very, very in love with him. I think – we will probably wait a little bit longer, but – if he asked tomorrow I would say yes,” Lovato told a New Zealand radio station.

As for when Lovato and Valderrama might get engaged? “You gotta ask him!” Lovato toldEntertainment Tonight when asked if she and Valderrama might get engaged in 2016. “I have no idea.”