The couple have remained tight-lipped about the nature of their friendship but media speculation has suggested that they were, in fact, an item.
The report claiming they have now split stems from some cryptic messages that Lovato has posted on her Twitter profile.
She first tweeted, “Loyalty is EVERYTHING.. I’m thankful for my friends who stand by my side,” the 19-year-old first tweeted.
Next came a re-tweet of somebody else posting a Marilyn Monroe quote, “A wise girl kisses but doesn’t love, listens but doesn’t believe, and leaves before she is left.” She followed this up with a message of her own: “The smartest thing a woman can ever learn, is to never need a man.”
Demi was first rumored to be dating Wilmer after she broke up from Joe Jonas in May 2010. The two were romantically involved before she entered rehab, but the romance rumors were quick to fizzle out. Earlier this year, it was speculated that they have rekindled their romance after they were spotted spending “a lot of time together”.