"They fought a lot," a secret source also told UsMagazine.com. "It was always on and off. He's a creative mind so not the easiest person to be in a relationship with."
Manson, 41, and Wood, 22, began dating in 2006 and split for the first time two years later, according to People.
U.S. & World
After reconciling the couple reportedly broke up on one other occasion.