Lovato and Valderrama announced their break up recently after six years of dating, saying they realised they were better as best friends.
Now, it is being said that they parted ways because Lovato wanted to get married while Valderrama thought otherwise, reported Acshowbiz.
"Demi wanted a ring, but Wilmer wasn't ready to get married. She didn't want to wait around anymore, so they decided to part ways," a source said.